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2. Structural and biological adaptations of Vermetidae (Gastropoda);BARASH;Bollettino Malacologico,1985
3. Ammonite shell morphotype distributions in the Western Interior Greenhorn Sea and some paleoecological implications;BATT;Palaios,1989
4. The stratigraphical palaeontology of the Lower Greensand;CASEY;Palaeontology,1961
5. Late Jurassic and early Cretaceous uncoiled ammonites: trophism-related evolutionary processes;CECCA;Comptes Rendus de l'Académie des Sciences-Series IIA-Earth and Planetary Science,1997