Gabriel Bujor Băbuţ (2018). ANALYSIS OF WAYS TO OPTIMIZE THE DESIGN AND OPERATION OF METHANE DRAINAGE SYSTEMS. SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 18th International Multidisciplinary Scientific GeoConference SGEM2018, Science and Technologies in Geology, Exploration and Mining, 111-118. https://doi.org/10.5593/sgem2018/1.3/s03.015