@inproceedings{sgem2020s03015,
  title = {GEOPHYSICAL AND MINING TECHNOLOGIES FOR INCREASING EFFICIENCY IN -HAN KRUM- OPEN PIT MINE, BULGARIA},
  author = {Maya Grigorova},
  booktitle = {SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 20th International Multidisciplinary Scientific GeoConference Proceedings SGEM 2020, Science and Technologies in Geology, Exploration And Mining},
  year = {2020},
  pages = {111-118},
  publisher = {STEF92 Technology},
  doi = {10.5593/sgem2020/1.2/s03.015}
}