TY - CPAPER AU - International authors TI - 14th International Multidisciplinary Scientific GeoConference SGEM 2014, Energy and Clean Technologies, Vol. 14, Book 4, Volume 2 T2 - International Multidisciplinary Scientific GeoConference SGEM 2014 PY - 2014 DO - 10.5593/sgem2014/b42 PB - STEF92 Technology ER -