Р.Р. Хасанов. THE STUDY OF THE COMPOSITION OF THE VISEAN COAL IN THE EASTERN PART OF THE EAST-EUROPEAN PLATFORM (RUSSIA FEDERATION) IN CONNECTION WITH THE PROSPECTS OF THEIR EXPLOITATION USING WELL METHODS. SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 18th International Multidisciplinary Scientific GeoConference SGEM2018, Science and Technologies in Geology, Exploration and Mining, 2018, pp. 589-594. https://doi.org/10.5593/sgem2018/1.1/s01.074