TY - CPAPER AU - Olga Nitcheva AU - Albena Vatralova TI - ASSESSMENT OF NITROGEN POLLUTION OF THE ENVIRONMENT IN BULGARIA AND NUMERICAL SIMULATIONS FOR ITS MITIGATION T2 - SGEM International Multidisciplinary Scientific GeoConference- EXPO Proceedings; 22nd SGEM International Multidisciplinary Scientific GeoConference Proceedings 2022 PY - 2022 SP - 41 EP - 48 DO - 10.5593/sgem2022/5.1/s20.006 PB - STEF92 Technology ER -