	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	1936	K voprosu o stratigrafii verkhnego paleozoya Aktybinskoi i Orenburgskoi oblastei Problemy Sovetskoi geologii, no. 1, pp. 49-58. Moscow-Leningrad.