	Authors	Year	Title
	Popov	1970	Ammonoidei. In: Stratigrafiya kamennougol'nykh i permskikh otlozhenii Severnogo Verkhoyan'ya. Trudy Nauchno-issledovatel'skogo instituta Geologii Arktiki, 1970: 113-140, fig.5-27, pl.13-19; Leningrad.