TY - CPAPER AU - Ľubomír Ambriško TI - INVESTIGATION OF THE AGEING INFLUENCE ON THE HARDNESS OF ESSENTIAL BELT COMPONENT T2 - SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 18th International Multidisciplinary Scientific GeoConference SGEM2018, Science and Technologies in Geology, Exploration and Mining PY - 2018 SP - 529 EP - 536 DO - 10.5593/sgem2018/1.3/s03.068 PB - STEF92 Technology ER -