Gerke, A. A. (1959). ? ????? ???? ???????? ??????????????? ??????????? ? ????????? ?????????????? ???? N?d?sari? - About the new genus of Permian nodosauriform foraminifera and refinement of the characteristics of the genus Nodosaria. ??????? ?????? ?? ????????????? ? ???????????????, ?????. ?. - Collection of articles on paleontology and biostratigraphy. 17: 41-59. page(s): p. 52 pl. 1 fig. 8-9