CHISTIKOV S. D. 1975. - Some problems of scaphopod taxonomy [in Russian]: 18-21, in Likharev I.M. (ed.) Molliuski: ikh sistema, evoliutsiia i rolīv prirode, avtoreferaty dokladov, sbornik piatyi [Molluscs, their Systematic, Evolution and Significance in Nature], Akademiia Nauka, Leningrad,.
