	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.
	Bogoslovskaya	1990	Osnovye puti razvitiya i klassifikatsiya pozdnepaleozoyskikh ammonoidey Marathonitaceae i Cyclolobaceae. Trudy Paleontologicheskogo Instituta Akademiya Nauk SSSR, 243: 70-86, fig.1-3; Moskva.