@inproceedings{sgem2001paper,
  title = {APPLICATION OF MINERAL AND CHEMICAL MEANS IN THE MINE PREVENTIVE MAINTENANCE IN EUROPEAN COAL YIELDING},
  author = {Witold Stachon and Emil Stanchev},
  booktitle = {1st International Scientific Conference - SGEM2001},
  year = {2001},
  pages = {201-214},
  publisher = {SGEM Scientific GeoConference},
  doi = {}
}