Zelenakova, Martina, Gargar, Ibrahim, Purcz, Pavol. "DROUGHT RISK ASSESSMENT IN LIBYA BY STATISTICAL METHODS." SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; SGEM2012 12th International Multidisciplinary Scientific GeoConference, 2012, pp. 633 - 640 pp. https://doi.org/10.5593/sgem2012/s13.v3015