TY - CPAPER AU - Marina Nevskaya AU - Oksana Marinina AU - Tatiana Kosovtseva AU - Chu Thi Que TI - COAL COMPANIES IN VIETNAM: PRODUCTION SUSTAINABILITY ANALYSIS T2 - SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 21st SGEM International Multidisciplinary Scientific GeoConference Proceedings 2021, Science and Technologies in Geology, Exploration And Mining PY - 2021 SP - 317 EP - 324 DO - 10.5593/sgem2021/1.1/s03.039 PB - STEF92 Technology ER -