@inproceedings{sgem2005paper,
  title = {TECHNOLOGICAL SCHEME FOR UNDERGROUND GASIFICATION OF COAL AND HARD HOUSEHOLD WASTES},
  author = {K. Dermendjiev},
  booktitle = {5th International Scientific Conference - SGEM2005},
  year = {2005},
  pages = {97-104},
  publisher = {SGEM Scientific GeoConference},
  doi = {}
}