	Authors	Year	Title
	Shimanskiy & Kuzina	1977	Rannekamennougol'nye golovonogie pripolyatnogo Urala. Byulleten' Mosk. Obshchestva Isp. Pripody, Otd. Geologii, 52 (6): 79-90, fig.1-2, pl.1,2; Moskva.