@inproceedings{sgem2020s19052,
  title = {ESTIMATION OF BLACK CARBON CONCENTRATION IN FINE PARTICULATE MATER IN URBAN AERA},
  author = {Elena Hristova and Blagorodka Veleva},
  booktitle = {SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 20th International Multidisciplinary Scientific GeoConference Proceedings SGEM 2020, Energy and Clean Technologies},
  year = {2020},
  pages = {415-422},
  publisher = {STEF92 Technology},
  doi = {10.5593/sgem2020/4.1/s19.052}
}