TY - CPAPER AU - International authors TI - 18th International Multidisciplinary Scientific GeoConference SGEM 2018, Energy and Clean Technologies, Vol. 18, Issue 4.3 T2 - International Multidisciplinary Scientific GeoConference SGEM 2018 PY - 2018 DO - 10.5593/sgem2018v/4.3 PB - STEF92 Technology ER -