Kaplun 1991. [Brachiopods of the Lower and Middle Devonian of the Dzhungaro-Balkhash Province.] Dubatolov, V.N.; Stukalina, G.A.[Eds]. [Biostratigraphy of the Lower and Middle Devonian of the Dzhungaro-Balkhash province.], Nauka, Novosibirsk, 1991: 1-334. Chapter pagination: 111-147, 291-303