Authors	Year	Title
Ruzhencev	1950	Verkhnekamennougol'nye ammonity Urala. Trudy Paleont. Inst., Akad. Nauk SSSR, 29: 1-220, fig.1-84, pl.1-15; Moskva.
Ruzhencev	1955b	K voprosu o proiskhozhdenii semeystva Shumarditidae. Dokl. Akad. Nauk SSSR, 103 (6): 1107-1110, fig.1-2; Moskva.
Tharalson	1984	Revision of the Early Permian ammonoid family Perrinitidae. Journal of Paleontology, 58 (3): 804-833, fig.1-24, 1tab.; Lawrence, Kansas.