@inproceedings{sgem2022s1936,
  title = {BACKGROUND CONCENTRATION OF AIR POLLUTANTS FOR SOFIA CITY - ANALYSIS FOR SUMMER AND WINTER MONTHS},
  author = {Hristina Kirova and Dimiter Syrakov and Maria Prodanova and Emilia Georgieva and Dimiter Atanassov},
  booktitle = {SGEM International Multidisciplinary Scientific GeoConference- EXPO Proceedings; 22nd SGEM International Multidisciplinary Scientific GeoConference Proceedings 2022, Energy and Clean Technologies},
  year = {2022},
  pages = {279-286},
  publisher = {STEF92 Technology},
  doi = {10.5593/sgem2022/4.1/s19.36}
}