@inproceedings{sgem2001paper,
  title = {DEFINING SLOPE ANGELS OF THE BENCHES AND THE OPENCAST FLANKS OF "PROPAST-DOBROVOLETC" MINE},
  author = {Konstantin Georgiev and Rada Gavrilova and Ognian Alexandrov},
  booktitle = {1st International Scientific Conference - SGEM2001},
  year = {2001},
  pages = {125-130},
  publisher = {SGEM Scientific GeoConference},
  doi = {}
}