Vdovenko 1967. [Some representatives of Endothyridae, Tournayellidae and Lituolidae from the Lower Visean deposits of Greater Donbas.] [Fauna of the Lower Visean deposits of greater Donbas.], [Fauna of the Lower Visean deposits of greater Donbas.] Akademiya Nauk Ukrainskoi SSR. Kiev. 1967: 18-29, 11 pls. [In Russian], 1967: 18-29. Chapter pagination: 18-29