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Leonova, Esaulova & Shilovskii |
2002 |
The First Ammonoid Find in the Volga-Urals Region.
Doklady Earth Sciences, 383A (3):239-241, 2 fig.
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Leonova, Kutygin & Shilovskii |
2005 |
New Data on the Composition and Evolution of the Permian Superfamily Popanocerataceae (Ammonoidea).
Paleontologicheskii Zhurnal, 39 (5): 20-29,5 fig.,1 pl. [Paleontological Journal, 39 (5): 476-486,5 fig.,1 pl.]
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Leonova & Shilovskii |
2007 |
Evolution of the Permian Family Spirolegoceratidae (Goniatitida, Ammonoidea).
Paleontologicheskii Zhurnal, 41 (1): 28-38, 3 fig.,pl.5.
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