TY - CPAPER AU - Georgi Gadzhev TI - VERTICAL STRUCTURE OF SOME POLLUTANT OVER BULGARIA - OZONE AND NITROGEN DIOXIDE T2 - SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 18th SGEM International Multidisciplinary Scientific GeoConference SGEM2018, Energy and Clean Technologies PY - 2018 SP - 449 EP - 454 DO - 10.5593/sgem2018v/4.3/s06.053 PB - STEF92 Technology ER -