Moraru, Roland Iosif, BABUT, GABRIEL BUJOR, POPESCU-STELEA, Stud.Eng. MIHAI. "GOB METHANE ACCUMULATION AND TRANSIENT GAS OCCURRENCES IN LONGWALL COAL FACES." SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 15th International Multidisciplinary Scientific GeoConference SGEM2015, SCIENCE AND TECHNOLOGIES IN GEOLOGY, EXPLORATION AND MINING (2015): 345-352. https://doi.org/10.5593/sgem2015/b13/s3.045