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Glenister & Furnish |
1988 |
Patterns in stratigraphic distribution of Popanocerataceae, Permian ammonoids.
Senckenbergiana lethaea, 69: 43-71, 10 text-figs., 4 pls., 2 tabl., Frankfurt.
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Leonova |
1999 |
Pamirskii tsentr diversifikatsii permskikh ammonoidei. [In Russian, with English summary: A Pamirian Center of Diversification of Permian Ammonoids.]
Paleontologicheskii Zhurnal, 1999 (4): 27-37, 8 figs., Moskva.
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