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Gerasimov P.A. (1955). The Mesozoic index fossils from the central region of the European part of the USSR. Volume 1. Lamellibranchiata, Gastropoda, Scaphopoda and Brachiopoda of the Jurassic Beds. Ministry for Geology & Mining of the USSR, Moscow. 380 pp. [in Russian].
Gerasimov P.A. (1955). The Mesozoic index fossils from the central region of the European part of the USSR. Volume 1. Lamellibranchiata, Gastropoda, Scaphopoda and Brachiopoda of the Jurassic Beds. Ministry for Geology & Mining of the USSR, Moscow. 380 pp. [in Russian].
