Naugolnykh Sergey V. Kukarskih Vladimir V. Solodyankin Dmitrij V. A new find of the foliar seed-bearing organ in the Lower Permian deposits of the Urals in a context of florogenetical links between Late Paleozoic and Mesozoic floras
Naugolnykh Sergey V. Mogilnikova Irina S. New data on systematic position and paleoecology of the Permian equisetophyte Annulina neuburgiana (Radczenko) Neuburg