@inproceedings{sgem2006paper,
  title = {SUSTAINABLE APPROACH TO ABANDONED OPEN-PIT MINES},
  author = {N. Znechev},
  booktitle = {6th International Scientific Conference - SGEM},
  year = {2006},
  pages = {287-296},
  publisher = {SGEM Scientific GeoConference},
  doi = {}
}