@inproceedings{sgem2025s0220,
  title = {PASSIVE TECHNOLOGY FOR TREATMENT OF ACID MINE DRAINAGE FROM THE AREA AROUND -RADKA- MINE IN BULGARIA},
  author = {Dobril Valchev},
  booktitle = {25th International Multidisciplinary Scientific GeoConference Proceedings SGEM2025, Science and Technologies in Geology, Exploration and Sustainable Mining},
  year = {2025},
  pages = {155-162},
  publisher = {STEF92 Technology},
  doi = {10.5593/sgem2025/1.1/s02.20}
}