@inproceedings{sgem2020s20071,
  title = {NATURAL REGENERATION OF THE ENVIRONMENT IN THE AREA OF THE OLD KRUMOVO IRON MINE IN SOUTHEAST BULGARIA},
  author = {Ivan Ivanov and Marinela Panayotova},
  booktitle = {SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 20th International Multidisciplinary Scientific GeoConference Proceedings SGEM 2020, Ecology, Economics, Education and Legislation},
  year = {2020},
  pages = {569-576},
  publisher = {STEF92 Technology},
  doi = {10.5593/sgem2020/5.1/s20.071}
}