Ershova Victoria B., Prokopiev Andrei V., Nikishin Valery A., Khudoley Andrey K., Malyshev Nikolay A., and Nikishin Anatoly M. 2015. “New Data on Upper Carboniferous - Lower Permian Deposits of Bol’shevik Island, Severnaya Zemlya Archipelago”. Polar Research 34 (May). https://doi.org/10.3402/polar.v34.24558.