Authors Year Title
Nassichuk 1995 Permian Ammonoids in the Arctic Regions of the World.
In: Scholle,P.A. et al.,eds., The Permian of Northern Pangea 1: 210-235, 10 fig., Berlin (Springer).
Popov 1970 Ammonoidei. In: Stratigrafiya kamennougol'nykh i permskikh otlozhenii Severnogo Verkhoyan'ya.
Trudy Nauchno-issledovatel'skogo instituta Geologii Arktiki,  1970: 113-140, fig.5-27, pl.13-19; Leningrad.