TY - CPAPER AU - Teodora Yankova TI - MINERAL PROCESSING WASTE UTILIZATION T2 - SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 20th SGEM International Multidisciplinary Scientific GeoConference Proceedings 2020, Science and Technologies in Geology, Exploration And Mining PY - 2020 SP - 821 EP - 828 DO - 10.5593/sgem2020/1.1/s04.100 PB - STEF92 Technology ER -