Baryshnikov, V. V.; Zolotova, V. P.; Kosheleva, V. F. (1982). ????? ???? ??????????? ?????????? ????? ????????? ????????? - New species of foraminifers from Artinskian stage of the Pre-Urals. Akademiya Nauk SSSR, Uralskii Nauchnyi Tsentr, Institut Geologii i Geokhimii, Sverdlovsk. 1-54., available online at (http://www.geokniga.org/books/7306) page(s): p. 24 pl. 7 fig. 13