@inproceedings{sgem2021s1934,
  title = {AIR PARTICULATE MATTER AND BLACK CARBON CONCENTRATIONS DURING WINTERTIME AT TWO BULGARIAN URBAN SITES},
  author = {Elena Hristova and Blagorodka Veleva and Stela Naydenova and Lenia Gonsalvesh},
  booktitle = {SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 21st SGEM International Multidisciplinary Scientific GeoConference Proceedings 2021, Energy and Clean Technologies},
  year = {2021},
  pages = {185-194},
  publisher = {STEF92 Technology},
  doi = {10.5593/sgem2021/4.1/s19.34}
}