| details |
Tournaisian |
|
USSR(Kazakh SSR) |
Stanichnikova,M.S. et al. Palynological characteristics of Permian and Carboniferous deposits of the southeast part of the Pre-Caspian Basin. (In: Palynological studies (Collected Articles) |
1976 |
| details |
Carboniferous |
Permian |
USSR(Irkutskaya Oblast) |
Suslova,M.G. et al. New data on the stratigraphy of Upper Paleozoic Coal-bearing sediments in the Middle Priangarie |
1982 |
| details |
Asselian |
|
USSR(Ukrainian SSR) |
Lankin,I.Y. et al. History of the Permian deposits from the South European Platform Article 3. Contemporary investigations. |
1994 |