Indad Salih. FRACTIONAL COMPOSITION OF HEAVY OIL ASPHALTENES OF VOLGA-URAL PETROLEUM PROVINCE. SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 17th International Multidisciplinary Scientific GeoConference SGEM2017, Science and Technologies in Geology, Exploration and Mining, 2017, pp. 485-492. https://doi.org/10.5593/sgem2017h/15/s06.061