TY - CPAPER AU - Tudor, Ec. GOLDAN AU - Roland, MORARU AU - Catalin, NISTOR Marian TI - WAYS TO IMPROVE COAL EXTRACTION OPERATIONS IN LIGNITE OPEN PITS WITHIN OLENIA BASIN, ROMANIA T2 - SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 13th SGEM GeoConference on SCIENCE AND TECHNOLOGIES IN GEOLOGY, EXPLORATION AND MINING PY - 2013 SP - 831 EP - 836 pp DO - 10.5593/sgem2013/ba1.v1/s03.081 PB - Stef92 Technology ER -