	Authors	Year	Title
	Bogoslovskaya	1978	Sistematika i filogeniya semeiystv Marathonitidae i Vidrioceratidae (Ammonoidea). Paleontologicheskiy Zhurnal, 1978 (1): 53-68, fig.1-7, pl.5; Moskva.
	Zhao	1980	Origin, classification, evolution and distribution of the family Cyclolobidae. Acta Paleontologica Sinica, 19 (2): 79-90, fig.1-5, tab.1-2; Beijing.