	Authors	Year	Title
	Popov	1975	Ammonoidea (Ammonoidei). In: Paleontologicheskii Atlas kamennougol'nykh otlozhenii Urala. [In Russian]. Trudy VNIGRI 383: 111-130, pls.35-44, Leningrad (Nedra).
	Popov & Kuzina	1997	The earliest Goniatitina (Ammonoidea) from the South Urals. Paleontological Journal, 31: 28-34, 5 text-figs., 1 pl.