Authors	Year	Title
Bogoslovskaya, Leonova & Shkolin	1995	The Carboniferous-Permian boundary and ammonoids from the Aidaralesh section, southern Urals. Journal of Paleontology 69: 288-301, 12 figs., Lawrence, KS.
Ruzhencev	1947b	Predstaviteli semeistva Dimorphoceratidae Hyatt v kamennougol'nykh otlozheniyakh Urala. Doklady Akad. Nauk SSSR, 56 (5): 521-524, fig.1-2; Moskva.
Ruzhencev	1950	Verkhnekamennougol'nye ammonity Urala. Trudy Paleont. Inst., Akad. Nauk SSSR, 29: 1-220, fig.1-84, pl.1-15; Moskva.