TY - CPAPER AU - Witold Bialy TI - NEW DEVICES USED IN DETERMINING AND ASSESSING MECHANICAL CHARACTERISTICS OF COAL T2 - SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 13th SGEM GeoConference on SCIENCE AND TECHNOLOGIES IN GEOLOGY, EXPLORATION AND MINING PY - 2013 DO - 10.5593/sgem2013/ba1.v1/s03.043 PB - Stef92 Technology ER -