TY - CPAPER AU - Daniela Zlatunova TI - AIR QUALITY MANAGEMENT IN THE BORDER REGION OF THE REPUBLIC OF BULGARIA AND THE REPUBLIC OF SERBIA T2 - SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 20th International Multidisciplinary Scientific GeoConference Proceedings SGEM 2020, Energy and Clean Technologies PY - 2020 SP - 297 EP - 304 DO - 10.5593/sgem2020/4.1/s19.037 PB - STEF92 Technology ER -