Karataiute-Talimaa 1983. [Heterostraci of the Lower Devonian in Severnaya Zemlya and their correlation.] Novitskaya, L.I.[Ed]. [Problems of recent palaeoichthyology. (Proceedings from the conference dedicated to D.V. Obruchev.).], Nauka, Moscow, 1983: 42-50. Chapter pagination: 22-28