Karatajute-Talimaa 1968. [New Thelodonti, Heterostraci and Arthrodira from the Chortkovian stratum of Podoliya.] Obruchev, D.V.[Ed]. [Essays on the phylogeny and systematics of fossil fish and Agnatha.], Nauka, Moscow, 1968: 1-172. Chapter pagination: 33-42