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Bogoslovskaya, Ustritskii & Cherniak |
1982 |
Permiskie ammonoidei Novoi Zemli.
Paleontologicheskii Zhurnal, 1982 (4): 58-67, 3 figs., pl.7.
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Nassichuk, Furnish & Glenister |
1965 |
The Permian ammonoids from Arctic Canada.
Bulletin of the Geological Survey of Canada, 131: 1-56, fig.1-17, tab.1-7, pl.1-5; Ottawa.
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