	Authors	Year	Title
	Popov	1999	Gzhelskie ammonoidei Karachatyra (Srednyaya Aziya). Voprosy paleontologii, Sankt-Peterburgskii Gosudarstvennyi Universitet, 11: 75-87, 2 figs., 2 pls., Sankt-Peterburg.
	Ruzhencev	1957	Verkhnekamennougol'nye ammonoidei v Sredney Asii. Dokl. Akad. Nauk SSSR, 114 (4): 889-892, fig.1-3; Moskva.