@inproceedings{sgem2002paper,
  title = {MAIN PRINCIPLES FOR CREATING NATIONAL GEOLOGICAL SERVER},
  author = {V. Trendafilov},
  booktitle = {2nd International Scientific Conference - SGEM2002},
  year = {2002},
  pages = {277-280},
  publisher = {SGEM Scientific GeoConference},
  doi = {}
}