1. On the fossils of the older deposits in the Rhenish provinces, preceded by a general survey of the fauna of Palaeozoic rocks, and followed by a tabular list of the organic remains of the Devonian System in Europe;Archiac E.J.A.D’;Transactions of the Geological Society of London,1842
2. Bandel, K. 1988: Operculum and buccal mass of ammonites. In Wiedmann, J. & Kullmann, J. (eds): Cephalopods—Present and Past, 653–678. Schweizerbart, Stuttgart.
3. New phyllopod crustaceans from the Devonian of Western New York;Clarke J.M.;American Journal of Science,1882
4. Contribuição ao estudo dos Aptychi (Cephalopoda-Ammonoidea) do Jurássico;Closs D.;Escola de Geologia de Pórto Alegre, Publicaçao Especial,1960
5. Gonatiten mit Radula und Kieferapparat in der Itararé-Formation von Uruguay;Closs D.;Paläontologische Zeitschrift,1967