Yakimenko, Elena, Svyatoslav Inozemtsev, and Sergey Naugolnykh. 2018. “Upper Permian Paleosols (Salarevskian Formation) in the Central Part of the Russian Platform: Paleoecology and Paleoenvironment”. Revista Mexicana De Ciencias Geológicas 21 (1):110-19. https://rmcg.geociencias.unam.mx/index.php/rmcg/article/view/908.