@inproceedings{sgem2003paper,
  title = {LIGNITE RECOVERY IN MULTI- SEAM OPEN-PIT MINING OPERATIONS IN NORTHERN GREECE},
  author = {N. Kolovos and D. Sotiropoulos and A. Georgakopoulos},
  booktitle = {3rd International Scientific Conference - SGEM2003},
  year = {2003},
  pages = {59-66},
  publisher = {SGEM Scientific GeoConference},
  doi = {}
}