	Authors	Year	Title
	Bogoslovskaya	1986	Ammonoidei. In: Atlas kharakternykh kompleksov Permskoi fauny i flory Urala i Russkoi platformy. Trudy, novaia seria, 331: 14-15, pl.37-59, (Nedra) Leningrad.
	Bogoslovskaya	1990	Osnovye puti razvitiya i klassifikatsiya pozdnepaleozoyskikh ammonoidey Marathonitaceae i Cyclolobaceae. Trudy Paleontologicheskogo Instituta Akademiya Nauk SSSR, 243: 70-86, fig.1-3; Moskva.
	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.
	Nassichuk	1971	Permian ammonoids and nautiloids, Southeastern Eagle Plain, Yukon Territory. Journal of Paleontology, 45 (6): 1001-1021, fig.1-12, tab.1-3, pl.124-126; Tulsa,Oklahoma.
	Ruzhencev	1952	Biostratigrafiya Sakmarskogo Yarusa v Aktyubinskoy Oblasti Kazakhskoy SSR. Trudy Paleontologicheskogo Instituta Akademiya Nauk SSSR, 42: 1-87, fig.1-28, pl.1-6; Moskva.