@inproceedings{sgem2002paper,
  title = {THE DISTRIBUTION OF LIGNITE QUALITY IN SOUTHERN FILED MINE, PROLEMAIS-AMYNTEO LIGNITE BASIN, GREECE},
  author = {N. Kolovos and A. Georgakopoulos and A. Filippidis},
  booktitle = {2nd International Scientific Conference - SGEM2002},
  year = {2002},
  pages = {51-62},
  publisher = {SGEM Scientific GeoConference},
  doi = {}
}