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Bogoslovsky & Kuzina |
1980 |
Podsdnedevonskiye ammonoidei Basseyna reki Kozhim na pripolyarnom Urale.
Paleontologicheskiy Zhurnal, 1980 (2): 67-73, fig.1,2, pl.9; Moskva.
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Kullmann |
2000 |
Ammonoid turnover at the Devonian-Carboniferous boundary.
Revue de Paléobiologie, Volume spécial 8: 169-180, 4 figs., 2 tabs., Genève.
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