|
Bogoslovskaya, Leonova & Shkolin |
1995 |
The Carboniferous-Permian boundary and ammonoids from the Aidaralesh section, southern Urals.
Journal of Paleontology 69: 288-301, 12 figs., Lawrence, KS.
|
|
|
Popov |
1999 |
Gzhelskie ammonoidei Karachatyra (Srednyaya Aziya).
Voprosy paleontologii, Sankt-Peterburgskii Gosudarstvennyi Universitet, 11: 75-87, 2 figs., 2 pls., Sankt-Peterburg.
|
|
|
Ruzhencev |
1950 |
Verkhnekamennougol'nye ammonity Urala.
Trudy Paleont. Inst., Akad. Nauk SSSR, 29: 1-220, fig.1-84, pl.1-15; Moskva.
|