	Authors	Year	Title
	Librovitch	1940	Ammonoidea iz kamennougol'nykh otlozhenii Severnogo Kazakhstana. Paleontologiia SSSR, 4 (9,1): 1-395, fig.1-78, pl.1-25; Moskva.
	Librovitch	1941	Otryad Ammonoidea. In: Atlas rukovodyashchikh form iskopaemykh faun SSSR, t. IV. Nizhniy otdel kamennougol'noy sistemy. Gosgeolizdat: 137-153, fig.13-43, pl.34-40; Moskva-Leningrad.