For citations:

Sadovnikov G.N. A structure of the ecozone Quadrocladus pachyphyllus... Prilukiella tomiensis of Vyatka stage of Upper Permian. Proceedings of higher educational establishments. Geology and Exploration. 2015;(4):8-14. (In Russ.) https://doi.org/10.32454/0016-7762-2015-4-8-14