	Authors	Year	Title
	Kutygin	1996	Spirolegotseratidy (Ammonoidea) severo-vostoka Rossii. [In Russian, with English summary: Spirolegoceratids (Ammonoidea) of Northeastern Russia]. Paleontologicheskii Zhurnal, 1996 (4): 16-23, 5 figs., Moskva.