1. Andrianov, V.N., Verkhnepaleozoiskie otlozheniya Zapadnogo Verkhoyan’ya (Tompo-Echiiskoe mezhdurech’e) (Upper Paleozoic Deposits of the Western Verkhoyansk Region: Tompo-Echiiskaya Interfluve), Moscow: Nauka, 1966.
2. Andrianov, V.N., Some remarks on the index forms of brachiopods and pelecypods of the Upper Paleozoic of the Verkhoyansk Region, in Problemy Stratigrafii devonskikh, permskikh i triasovykh otlozhenii Verkhoyan’ya (Problems of Stratigraphy of the Devonian, Permian, and Triassic of the Verkhoyansk Region), Yakutsk: Yakut. Fil. Sib. Otd. Akad. Nauk SSSR, 1975, pp. 100–119.
3. Archbold, N.W. and Dickins, J.M., Permian, in An Australian Phanerozoic Timescale, Yong, G.S. and Laurie, J.R, Eds., Melbourne: Oxford Univ. Press, 1996, pp. 127–135..
4. Astafieva, M.M., Permskie inotseramopodobnye dvustvorchatye mollyuski Rossii (Permian Inoceramus-like bivalves of Russia), Moscow: Nauka, 1993.
5. Biakov, A.S., New ideas on the system of the Permian Inoceramus-like bivalves of the Eastern Boreal Zone, Paleontol. J., 2008, vol. 42, no. 3, pp. 232–242.