Shevyrev 1965. Ammonoidea pp. 166-182. Ruzhentzev V. E., ; Sar'cheva, T. G.[Eds]. [Development and succession of organisms on the boundary of Paleozoic and Mesozoic], [Development and succession of organisms on the boundary of Paleozoic and Mesozoic] Trudy paleozool. Inst. Akad. Nauk SSSR 108: 1-431, 58 pls., 59 figs., 16 tabs. [In Russian]", 1965: 1-431. Chapter pagination: 1-431