Bogdanovich, A. K. (1952). ????????? ? ???????????. ?????????? ???????????? ???? - Miliolidae and Peneroplidae. The fossil foraminifera of USSR. ????? ?????? - Proceedings of the Oil Research Geological Institut (VNIGRI). 64: 1-338 (in Russian)., available online at (https://books.google.pt/books/about?id=USphDwAAQBAJ) page(s): p. 183 pl. 28 fig. 2-5
