Ion Toth (2013). REOPENING A COAL FACE FROM PETRILA MINING UNIT AFTER THE OCCURRENCE OF AN EXPLOSION. SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 13th SGEM GeoConference on SCIENCE AND TECHNOLOGIES IN GEOLOGY, EXPLORATION AND MINING. https://doi.org/10.5593/sgem2013/ba1.v1/s03.059