TY - CPAPER AU - Assist. Eng. Krastina Malcheva AU - Hristo Chervenkov TI - WINTER CIRCULATION CONDITIONS OVER BULGARIA T2 - SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 15th International Multidisciplinary Scientific GeoConference SGEM2015, ENERGY AND CLEAN TECHNOLOGIES PY - 2015 SP - 1129 EP - 1136 DO - 10.5593/sgem2015/b41/s19.145 PB - Stef92 Technology ER -