3/3/2015 List of academic databases and search engines ­ Wikipedia, the free encyclopedia List of academic databases and search engines From Wikipedia, the free encyclopedia

This page contains a representative list of major databases and search engines useful in an academic setting for finding and accessing articles in academic journals, repositories, archives, or other collections of scientific and other articles. As the distinction between a database and a search engine is unclear for these complex document retrieval systems, see:

the general list of search engines for all­purpose search engines that can be used for academic purposes bibliographic databases for information about databases giving bibliographic information about finding books and journal articles.

Note that "free" or "subscription" can refer both to the availability of the database or of the journal articles included. This has been indicated as precisely as possible in the lists below.

This is an incomplete list that may never be able to satisfy particular standards for completeness. You can help by expanding it (https://en.wikipedia.org/w/index.php? title=List_of_academic_databases_and_search_engines&action=edit) with reliably sourced entries.

Access Name Discipline(s) Description Provider(s) Cost Several versions: Complete, Elite, Premier, and Alumni Academic Search Multidisciplinary Subscription EBSCO Publishing[2] Edition[1] Aerospace & High Aerospace, Technology Aeronautics, Subscription ProQuest[3] Database Astronautics Free African Journals abstracts; African Journals Multidisciplinary Scholarly journals published in Africa[4] OnLine (AJOL) Subscription OnLine[5] full­text Sociology, Includes information on aging­related topics, including AgeLine Subscription EBSCO Publishing[6] Gerontology economics, public health and policy. Produced by the United States National AGRICOLA: Agricultural Library. Free & Agricultural Online Agriculture Free access provided by Subscription Access NAL.[7] Subscription access provided by ProQuest,[8] OVID.[9] Covers agriculture, forestry, animal husbandry, aquatic sciences and fisheries, human nutrition, extension literature Produced by the Food and Agriculture AGRIS: from over 100 participating countries. Organization of the Agricultural Agriculture Free Material includes unique such as unpublished United Nations. database scientific and technical reports, theses, conference papers, http://agris.fao.org government publications, and more. AGRIS

Airiti Inc Multidisciplinary , Taiwan. Subscription Airiti Inc[10]

Analytical Royal Society of Chemistry Subscription Abstracts Chemistry[11] National Science Digital Library and the Analytical sciences Analytical Analytical Chemistry Free digital library chemistry Division of the American Chemical Society[12] Anthropological Royal Anthropological Anthropology Index only (no abstracts or full­text). Free Index Online Institute[13] Free to Harvard Maintained by Harvard http://en.wikipedia.org/w/index.php?title=List_of_academic_databases_and_search_engines&printable=yes 1/12 3/3/2015 List of academic databases and search engines ­ Wikipedia, the free encyclopedia Anthropological faculty, staff University. Non­ Anthropology Literature and students. Harvard access provided Subscription by OCLC[14] for non­ Harvard access. German Archaeological Archaeology, Art Institute & the Arachne German language Free history University of Cologne[15] Computer Online service used to index and search academic social Arnetminer Free Tsinghua University[16] Science networks Arts & Humanities Arts, Humanities Part of Subscription Thomson Reuters[17] Citation Index Physics, Mathematics, Computer science, Repository of electronic pre­prints of papers in the fields of arXiv Nonlinear mathematics, physics, astronomy, computer science, Free Cornell University[18] sciences, quantitative biology, statistics, and quantitative finance. Quantitative biology and Statistics Association for Computer Association for Computing Science, Subscription Computing Machinery Digital Engineering Machinery[19] Library Astrophysics, Astrophysics Data Geophysics, Free [20] System Harvard University Physics ATLA Religion Provides information on topics such as biblical studies, Religious studies Subscription [21] Database world religions, church history, and religion in social issues AULIMP: Air University Library's Index to Military Science Free Air University[22] Military Periodicals BASE: Bielefeld Academic Search Multidisciplinary Free Bielefeld University[23] Engine Available from Elsevier Organic Beilstein database Subscription under the product name chemistry Reaxys[24] A complete collection of bibliographic references covering Biological Available from Biology life science and biomedical research literature published from Subscription Abstracts Thomson Reuters[25] more than 4,000 journals internationally. Free abstract Biology, A full­text aggregation of more than 180 scientific journals & references, Ecology, and publishing current research in Biodiversity Conservation, Available from BioOne Environmental Biology, Ecology, Environmental Science, Entomology, BioOne[26] titles, and Science Ornithology, Plant Science, and Zoology. Subscription Available from Liebel­ Lab [1] (http://liebel­ Bioinformatic Biology, A meta search engine for 50 major bioinformatic databases lab.fzk.de) KIT Free Harvester Bioinformatics and projects. Karlsruhe Institute of Technology [2] (http://harvester.fzk.de) Book Review Book reviews Subscription Thomson Gale[27] Index Online Books In Print Books Subscription R.R. Bowker[28] Applied Life Bibliographic information service providing access to CAB Abstracts Subscription CABI[29] Sciences applied life sciences literature. Chemical Abstracts American Chemical Chemistry Subscription http://en.wikipedia.org/w/index.php?title=List_of_academic_databases_and_search_engines&printable=yes 2/12 3/3/2015 List of academic databases and search engines ­ Wikipedia, the free encyclopedia Service Society[30] Pennsylvania State ChemXSeer Chemistry Free University[31] Chinese Social Science Citation Social sciences Subscription Nanjing University[32] Index Medicine, Includes reviews of research to promote evidence­based Cochrane Library Subscription Wiley Interscience[33] Healthcare healthcare. CINAHL: Cumulative Index Nursing, Allied Subscription EBSCO[34] to Nursing and Health Allied Health Free Database of 15 million articles in the Japanese language from abstracts; National Institute of CiNii Multidisciplinary 3600 journals. Subscription Informatics[35] full­text CHBD: Circumpolar University of Health Medicine Free Calgary[36] Bibliographic Database

Mathematics, University of Citebase Search Computer Semi­autonomous citation index of free online research Free Southampton[37] science, Physics Computer CiteULike Free science Computer Pennsylvania State CiteSeer Replaced by CiteSeerX. Free Science University[38] Computer science, Statistics, Pennsylvania State CiteSeerX Free Mathematics, University[39] becoming Multidisciplinary CogPrints: Science University of Cognitive Sciences Free (General) Southampton[40] Eprint Archives The Collection of Computer Alf­Christian Computer Science Free science Achilles[41] Bibliographies Compendex Engineering Electronic version of Engineering Index. Subscription Elsevier[42] American Statistical Association and the Current Index to Statistics [43] Subscription Institute of Statistics Limited free search Mathematical Statistics[44] Part of Web of Knowledge. Contains 7 discipline­specific Current Contents Multidisciplinary Subscription Thomson Reuters[45] subsets. The Directory Of Open Access Journals (DOAJ) lists more Directory of Open Journals than 10,000 open access journals (September 2014) in Free [47] Access Journals Lund University multiple research areas.[46] Computer Comprehensive list of papers from major computer science University of Trier, DBLP Free science conferences and journals Produced by the ZBW­ German National EconBiz supports research in and teaching of economics Library of Economics– EconBiz Economics with a central entry point for all kinds of subject­specific Free Leibniz Information information and direct access to full texts. Centre for Economics (ZBW)[48] Produced by the American Economic The American Economic Association's electronic database, Association.[49] EconLit Economics the world's foremost source of references to economic Subscription http://en.wikipedia.org/w/index.php?title=List_of_academic_databases_and_search_engines&printable=yes 3/12 3/3/2015 List of academic databases and search engines ­ Wikipedia, the free encyclopedia literature. Available from CSA, DIALOG, OCLC, OVID, and AEA.[50] Biomedicine, Biomedical database with a strong focus on drug and EMBASE Subscription Elsevier[51] Pharmacology pharmaceutical research. Produced by the United ERIC: Educational States Department of Education literature and resources. Provides access to over Resource Education Free [52] 1.3 million records dating back to 1966. Education. Also Information Center available by subscription from OCLC, CSA. Produced by the International Food Information Service. Food Science and Food science, The world's leading database of information on food science, Access provided by Technology Food technology, Subscription food technology and nutrition OVID, Web of Abstracts Nutrition Knowledge, Dialog, DataStar and STN International[53] Descriptions of women's history collections from sources in London Metropolitan GENESIS Women's history Free the UK, as well as women's history . University[54]

Specialist bibliographic, abstracting and indexing datatabase Global Health Public Health Subscription CABI[55] dedicated to public health research and practice. Free online The Golm Metabolome Database (GMD) is a reference mass search; Golm Metabolome Mass spectra library of biologically active metabolites quantified Golm Metabolome offline use Database spectrometry using gas chromatography (GC) coupled to mass Database[56] by spectrometry (MS). subscription Google Scholar Multidisciplinary Free Google[57] GoPubMed, the first knowledge­based search engine for the GoPubMed Medicine Free Transinsight[58] life sciences industry. An alternative interface to the PubMed medical literature HubMed Medicine Free Alf Eaton[59] database Computer Science, IEEE Xplore Subscription IEEE[60] Engineering, Electronics database – the IC Journal Master List – contains currently over 2,500 journals from all over the world, including 700 journals from Poland. The journals registered in this database underwent rigorous, Multidisciplinary Index Copernicus Index Copernicus multidimensional parameterization, proving high quality. The Free science [62] Ministry of Science and Higher Education acknowledged the International IC Journal Master List by placing it on the list of scored databases, for being indexed in IC JML journals get additional points in the Ministry’s evaluation process.[61] The Information Bridge: DOE Scientific and Technical Information Information provides free public access to over 266,000 full­ United States Bridge: text documents and bibliographic citations of Department of Department of Energy, Department of Energy (DOE) research report literature. Documents are Multidisciplinary Free Office of Scientific and Energy Scientific primarily from 1991 forward and were produced by DOE, Technical and Technical the DOE contractor community, and/or DOE grantees. Information[63] Information Legacy documents are added as they become available in electronic format. Australasian aggregator of bibliographic databases and Informit Multidisciplinary N/A RMIT Publishing[64] journals Free searching; IngentaConnect Multidisciplinary Ingenta[65] Subscription full­text Indian Citation Index (ICI) is a home grown abstracts and citation database, with multidisciplinary objective knowledge Indian Citation contents from about 1000 top Indian scholarly journals. It Multidisciplinary Subscription ICI[66] Index provides powerful search engine to fulfill search and http://en.wikipedia.org/w/index.php?title=List_of_academic_databases_and_search_engines&printable=yes 4/12 3/3/2015 List of academic databases and search engines ­ Wikipedia, the free encyclopedia evaluation purposes for researchers, policy makers, decision makers etc. The leading bibliographic database providing abstracts and Physics, indexing to the world's scientific and technical papers in Engineering, Inspec physics, electrical engineering, electronics, communications, Subscription [67] Computer IET control engineering, computing, information technology, Science manufacturing, production, and mechanical engineering. Contains information on university philosophy departments Free search; International Philosophy and programs, philosophical societies, research centers, full access Directory of Philosophy Documentation journals, and philosophy publishers in the U.S., , and by Philosophy Center[68] approximately 130 other countries. subscription

Serves students, teachers, and researchers in UK further education and higher education, offering a selection of Intute Multidisciplinary around 300,000 academic websites which have been hand­ Free Intute[69] picked and described by subject specialists. No longer maintained. Links to journal's JournalSeek Multidisciplinary Open access journals in different language home page JournalSeek[70] and publishers JSTOR: Journal Multidisciplinary Subscription JSTOR[71] Storage (Historical) Links to journal's JournalSeek Multidisciplinary Open access journals in different language home page JournalSeek[70] and publishers Jurn is a free­to­use online search tool for finding and downloading free full­text scholarly works. In 2014 Jurn expanded beyond open access journals in the arts and Jurn Multidisciplinary Free Jurn[72] humanities, to also index open journals in ecology, science, biomedical, business and economics. Jurn is actively curated and maintained. Free Over 400,000 teacher­reviewed classroom resources Abstract; Lesson Planet Education (K­12) including lesson plans, worksheets, educational videos, and Lesson Planet[73] Subscription education articles. full­text Electronic database for legal and public­records related LexisNexis Law (general) Subscription Reed Elsevier[74] information American Mathematical MathSciNet Mathematics Available in print as Mathematical Reviews Subscription Society[75] Produced by the United States National Library of Medicine, the United States National MedlinePlus Medicine Free Institutes of Health, and the United States Department of Health and Human Services[76] The Mendeley research catalog is a crowdsourced database of research documents. Researchers have uploaded nearly Mendeley Multidisciplinary 100M documents into the catalog with additional Free Mendeley[77] contributions coming directly from subject repositories like Pubmed Central and Arxiv.org or web crawls. Produced by Merck & Co.. Available from Chemistry, CambridgeSoft Merck Index Biology, Also available in print. Subscription Corporation, Dialog, Pharmacology Knovel, MedicinesComplete, STN International[78] Produced by the Meteorological and Meteorology, American http://en.wikipedia.org/w/index.php?title=List_of_academic_databases_and_search_engines&printable=yes 5/12 3/3/2015 List of academic databases and search engines ­ Wikipedia, the free encyclopedia Geoastrophysical Astrophysics, Subscription Meteorological Society. Abstracts Geology Available from Dialog[79] and CSA.[80]

Computer Science and a Microsoft Provides many innovative ways to explore scientific papers, limited extent on Free Microsoft Academic Search conferences, journals, and authors[81] information science NBER: National Bureau of National Bureau of Economics Free Economic Economic Research[82] Research United States National Criminal Criminology, Abstracts of scholarly journal articles, agency and NGO Department of Justice, Justice Reference Free Sociology reports, and conference proceedings Office of Justice Service[83] Programs[84] National Diet National Diet Multidisciplinary Japanese. Catalog for the National Library of . N/A Library Collection Library[85] OAIster Multidisciplinary Free OCLC[86] Institut de l'information OpenSIGLE Grey literature Indexes European grey literature. Free scientifique et technique[87] Free abstract Philosophy Applied ethics, Philosophy Journals, series, conference proceedings, and other works & preview; Documentation Philosophy, Documentation from several countries online. Subscription Center eCollection Religious studies Center[88] full­text Philosophy Philosophy Philosophy Index of books, journals, disserations, and other documents Subscription Documentation Research Index Center[88] PhilPapers Philosophy Free PhilPapers[89] Free abstract POIESIS: Philosophy, Philosophy & preview; Philosophy Online applied ethics, Journals and series, online access for institutions with print Documentation Subscription Serials religious studies Center[88] full­text

POPLINE® contains the world’s most comprehensive Knowledge for Health, collection of population, family planning and related Center for Population, reproductive health and development literature. An Communication Family Planning, international resource, POPLINE helps program managers, POPLINE Free Programs, Johns Reproductive policy makers, and service providers in low­ and middle­ Hopkins Bloomberg Health income countries and in development­supportive agencies School of Public and organizations gain access to journal articles and other Health[90] scientific, technical, and programmatic publications. Project MUSE is a provider of digital humanities and social Project MUSE, Johns Humanities, Project MUSE science content for the scholarly community. MUSE Subscription Hopkins University social science provides full­text versions of scholarly journals and books. Press[91] The largest resource devoted to peer­reviewed literature in Produced by the behavioral science and mental health. It contains over 2.6 APA.[92] Available from PsycINFO Psychology Subscription million citations and summaries dating as far back as the several database early 19th century. vendors.[93] An online, multimedia digital archive containing the profiles of 250 feminist psychologists who have shaped and continue to transform the discipline of psychology. Profiles are Based at York Psychology's organized in two sections, "Women Past" and "Feminist Psychology Free University, Toronto, Feminist Voices Presence." All profiles on the Feminist Presence section Canada.[94] contain original interview transcripts and video clips with the psychologist discussing their feminist development and academic career. National Center for Biotechnology PubChem Chemistry Free Information and the U.S. National Library of Medicine[95] http://en.wikipedia.org/w/index.php?title=List_of_academic_databases_and_search_engines&printable=yes 6/12 3/3/2015 List of academic databases and search engines ­ Wikipedia, the free encyclopedia Pubget Multidisciplinary Subscription Pubget National Institutes of Health and the U.S. PubMed Biomedical Free National Library of Medicine[96] PubPsych is a free information retrieval system for psychological resources. It offers a comprehensive and Leibniz Institute for PubPsych Psychology balanced selection of resources from a growing number of Free Psychology Information international databases with a European focus, covering the needs of academic and professional psychologists. Questia: Online Multidisciplinary Subscription Questia[97] Research Library (Historical) Readers' Guide to Journals and H. W. Wilson Periodical Coverage: 1983–present. Subscription Magazines Company[98] Literature Reader's Guide Journals and H. W. Wilson Retrospective: Subscription Magazines Company[99] 1890–1982

RePEc: Research Volunteer Papers in Economics Free Collaboration[100] Economics Biomedical resources with special focus for medical professionals. Retina medical Retina medical Biomedical Free search searches among physician level standard documents search[101] eliminating patient level materials.

Subscription. Limited free Rock's Backpages Music Primary documents from the history of rock and roll Backpages Limited[102] access with registration. Russian Science Scientific A bibliographic database of scientific publications in Scientific Electronic Free Citation Index journals Russian. Library[103] Graduate School of Public Health, San Diego State Citations and abstracts of journal articles and reports from University[104] and the researchers working in the more than 35 distinct professional SafetyLit Multidisciplinary Free World Health disciplines (architecture ­ zoology) relevant to preventing Organization's unintentional injuries, violence, and self­harm. Department of Violence and Injury Prevention[105]

SciDiver is an academic paper search engine for the physical sciences.

The service currently maintains an index over arXiv, the SciDiver.com Multidisciplinary service for mathematics, physics, astronomy, Free SciDiver.com[106] computer science, quantitative finance and related disciplines; expansion to additional repositories is expected in the course of the site's continued development.

SciELO is a bibliographic database and a model for cooperative electronic publishing in developing countries FAPESP, CNPq and SciELO Journals originally from . It contains 985 scientific journals Free BIREME from different countries in free and universal access, full­ text format. Science.gov Alliance, 18 scientific and technical organizations from 14 federal agencies that A gateway to government science information and research contribute to results. Science.gov provides a search of over 45 scientific Science.gov. United Science.gov Multidisciplinary databases and 200 million pages of science information with Free States Department of just one query, and is a gateway to over 2000 scientific Energy, Office of Websites. http://en.wikipedia.org/w/index.php?title=List_of_academic_databases_and_search_engines&printable=yes 7/12 3/3/2015 List of academic databases and search engines ­ Wikipedia, the free encyclopedia Scientific and Technical Information serves as the operating agent for Science.gov.[107] United States Department of Energy, A gateway to results of DOE research and development and Science Accelerator Multidisciplinary Free Office of Scientific and major R&D accomplishments of interest to DOE. Technical Information.[108] Science Citation Science Part of Web of Science Subscription Thomson Reuters[109] Index (General) ScienceDirect Multidisciplinary Subscription Elsevier[110] Scopus is the world's largest abstract and citation database of peer­reviewed research literature. It contains over 20,500 titles from more than 5,000 international publishers. While it Scopus Multidisciplinary is a subscription product, authors can review and update their Subscription Elsevier[111] profiles via ORCID.org or by first searching for their profile at the free Scopus author lookup page (http://www.scopus.com/search/form/authorFreeLookup.url). Students search together collaboratively for scholarly articles Zakta SearchTeam Multidisciplinary Free and resources (http://zakta.com)[112] Social Science Social science Part of Web of Science Subscription Thomson Reuters[113] Citation Index Free abstracts; Socol@r: Socolar Multidisciplinary Scholarly open access resources in different language Socolar[114] Links to full­ text SSRN: Social Social Science Contains an abstracts database and an electronic paper Science Research Social science Free Electronic Publishing, collection, arranged by discipline. Network Inc.[115] SSRRN: Social Social Science Research Science Research Social science Indexes datasets and statistical codes Free Resources Network Resources Network =[116]

Stanford Linear Physics, (High SPIRES­HEP Free Accelerator Center & Energy) partners[117] Free abstract & preview; SpringerLink Multidisciplinary Springer[118] Subscription full­text Ulrich's Periodicals Periodicals Subscription ProQuest[119] Directory European Centre for the Social Science, VET­Bib European vocational education and training (VET) literature Free Development of Education Vocational Training[120] Includes other products, such as Web of Science, Biological Web of Knowledge Multidisciplinary Subscription Thomson Reuters[121] Abstracts & The Zoological Record Science Includes other products, such as Social Science Citation Web of Science Subscription Thomson Reuters[122] (General) Index & Science Citation Index. WestLaw Law (General) Subscription Thomson Reuters Free & WorldCat Multidisciplinary Unified catalog of member libraries' catalogs OCLC[123] Subscription The WorldWideScience Alliance, a multilateral partnership, consists of participating member WorldWideScience is a global science gateway composed of countries and provides national and international scientific databases and portals. the governance structure WorldWideScience accelerates scientific discovery and for WorldWideScience. WorldWideScience Multidisciplinary progress by providing one­stop searching of databases from Free United States around the world. Multilingual WorldWideScience provides Department of Energy, real­time searching and translation of globally dispersed Office of Scientific and http://en.wikipedia.org/w/index.php?title=List_of_academic_databases_and_search_engines&printable=yes 8/12 3/3/2015 List of academic databases and search engines ­ Wikipedia, the free encyclopedia multilingual scientific literature. Technical Information serves as the operating agent for WorldWideScience.[124]

National Diet Library's Zasshi Kiji Sakuin: Online Catalog,[125] Japanese Journals Japanese. N/A [126] Periodicals Index MagazinePlus, CiNii[127] Springer Zentralblatt MATH Mathematics First three records free without subscription. Subscription Science+Business Media[128] The Zoological Unofficial register of scientific names & papers in Zoology. Zoology Subscription Thomson Reuters[129] Record Coverage 1864–present.

See also

See also the categories Full text scholarly online databases and Bibliographic databases.

List of digital library projects List of educational video websites List of neuroscience databases List of online databases List of Internet encyclopedias List of open­access journals List of open­access projects List of repositories

References

1. ^ "List of EBSCO databases" (http://www.ebscohost.com/thisMarket.php?marketID=1). Ebscohost.com. Retrieved 2014­08­05. 2. ^ "Academic Search Complete" (http://www.ebscohost.com/thisTopic.php?marketID=1&topicID=633). Ebscohost.com. Retrieved 2014­08­05. 3. ^ Aerospace & High Technology Database (http://www.csa.com/factsheets/aerospace­set­c.php) 4. ^ Rosenberg, Diana (1 January 2002). "African Journals Online: improving awareness and access" (http://www.ingentaconnect.com/content/alpsp/lp/2002/00000015/00000001/art00007). Learned Publishing 15 (1): 51–57. doi:10.1087/095315102753303689 (https://dx.doi.org/10.1087%2F095315102753303689). Retrieved 14 November 2011. 5. ^ "African Journals Online (AJOL)" (http://www.ajol.info). Ajol.info. Retrieved 2014­08­05. 6. ^ "AgeLine, EBSCO Publishing" (http://www.ebscohost.com/thisTopic.php?marketID=2&topicID=23). Ebscohost.com. Retrieved 2012­08­26. 7. ^ " " (2014­05­19). "AGRICOLA (NAL Catalog)" (http://agricola.nal.usda.gov/). Agricola.nal.usda.gov. Retrieved 2014­08­05. 8. ^ "Agricola" (http://www.proquest.com/en­US/catalogs/databases/detail/agricola­set­c.shtml). ProQuest. Retrieved 2014­08­05. 9. ^ AGRICOLA (Ovid) (http://www.ovid.com/site/catalog/DataBase/9.jsp) 10. ^ "Airiti Inc" (http://www.airiti.com). Airiti.com. Retrieved 2014­08­05. 11. ^ "Analytical Abstracts" (http://www.rsc.org/Publishing/CurrentAwareness/AA/index.asp). Rsc.org. Retrieved 2014­08­05. 12. ^ "Analytical Sciences Digital Library" (http://www.asdlib.org/aboutASDL.php). Asdlib.org. Retrieved 2014­08­05. 13. ^ "Anthropological Index Online" (http://aio.anthropology.org.uk/aio/). Aio.anthropology.org.uk. 2014­04­08. Retrieved 2014­08­05. 14. ^ "Anthropological Literature" (http://hcl.harvard.edu/libraries/tozzer/anthrolit/anthrolit.cfm). Hcl.harvard.edu. 2014­07­01. Retrieved 2014­08­05. 15. ^ "Arachne" (http://arachne.uni­koeln.de/drupal/). Arachne.uni­koeln.de. Retrieved 2014­08­05. 16. ^ "Arnetminer.org" (http://arnetminer.org). Arnetminer.org. Retrieved 2014­08­05. 17. ^ "Arts & Humanities Citation Index" (http://www.thomsonreuters.com/products_services/science/science_products/a­ z/arts_humanities_citation_index). Thomsonreuters.com. 2014­01­27. Retrieved 2014­08­05. 18. ^ "arXiv.org" (http://arxiv.org/). arXiv.org. Retrieved 2014­08­05. 19. ^ "Association for Computing Machinery" (http://portal.acm.org/). Portal.acm.org. Retrieved 2014­08­05. http://en.wikipedia.org/w/index.php?title=List_of_academic_databases_and_search_engines&printable=yes 9/12