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B.  Likharev, ?Permskaya sistema?, Atlas rukovodiashchikh form iskopaemykh faun SSSR, vol. 6. GONTI NKTP SSSR, Leningrad, Moskva, p. ??, 1939.

I.  G. Krymgolts, ?Nizhnij i srednij otdely iurskoj sistemy?, Atlas rukovodiashchikh form iskopaemoj fauny SSSR, vol. 8. Gos. izd-vo geol. lit-ry, Moskva, 1947.

H.  Grizel, ?Atlas d'histologie et de cytologie des mollusques bivalves marins / An atlas of histology and cytology of marine bivalve molluscs?. Ifremer, Plouzané, France, p. 200, 2003.

I.  G. Krymgolts, ?Nizhnij i srednij otdely iurskoj sistemy?, Atlas rukovodiashchikh form iskopaemoj fauny SSSR, vol. 8. Gos. izd-vo geol. lit-ry, Moskva, 1947.

B.  Likharev, ?Permskaya sistema?, Atlas rukovodiashchikh form iskopaemykh faun SSSR, vol. 6. GONTI NKTP SSSR, Leningrad, Moskva, 1939.

P.  Pelseneer, ?Mollusca?, A treatise on zoology. Part 5. Adan & Charles Black, London, p. 355, 1906.