Vlastimil Hudecek. "MINING OF FACE WITH INCREASED METHANE CONCENTRATIONS IN MINES OF THE JOINT - STOCK COMPANY OKD, A.S. IN THE CZECH REPUBLIC." SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; SGEM2012 12th International Multidisciplinary Scientific GeoConference (2012). https://doi.org/10.5593/sgem2012/s03.v1035