	Authors	Year	Title
	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.