↑Khalfin, L. L. (1940) Peletsipodi nizhnego Devona Altaia [Lower Devonian pelecypods of the Altai]. Tomskiy Gosudarst. Univ.; Trudy Nauchnoi Konferentsii po Izucheniiu i Osvoeniiu Proizveditelnykh sil Sibiri [ Tomskiy Gosudarst. Univ.; Proceedings of the Scientific Conference on the Study and Development of the Productive Forces of Siberia]. 2:256–289, pl. 1–3.