Sergey Sitnov. "GROUP COMPOSITION OF BITUMOIDS OF THE LOWER MATURE DOMANIC SHALE SAMPLES DEPENDING ON THE DEPTH." SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 17th International Multidisciplinary Scientific GeoConference SGEM2017, Science and Technologies in Geology, Exploration and Mining, 2017, pp. 227-234. https://doi.org/10.5593/sgem2017h/15/s06.029