Grammoceras
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- The Ammonite Zones of the Toarcian in Bulgaria – New Evidence, Subzonation and Correlation with the Standard Zones and Subzones in North-Western Europe
- The Biostratigraphy of the Upper Pliensbachian–Toarcian (Lower Jurassic) Sequence at Ilminster, Somerset
- Latest Toarcian-Earliest Bajocian Uurassic) Grammoceratinae
- Paleobiogeographic Zoning of the Basins of the Caucasus in the Early Jurassic-Bajocian by Ammonites
- Wavelet Analysis of Ammonoid Sutures
- Mature Modifications and Sexual Dimorphism
- Early Jurassic) Ammonoids in the Northwestern Panthalassa Shelf Basin
- Lower Jurassic (Pliensbachian and Toarcian) Ammonites from Eastern Oregon and California
- Jurassic Sea-Level Variations: a Reappraisal
- Eigenshape Analysis of Ammonoid Sutures