L.M. Sitdikova, V.G. Izotov, A.V. Vakhin. THE ROLE OF CLAY FLUID SEALS OF NATURAL BITUMEN DEPOSITS OF THE REPUBLIC OF TATARSTAN UNDER THERMAL METHODS OF IMPACT ON THE ROCK BED. SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 17th International Multidisciplinary Scientific GeoConference SGEM2017, Science and Technologies in Geology, Exploration and Mining, 2017, pp. 567-574. https://doi.org/10.5593/sgem2017h/15/s06.072