@inproceedings{sgem2012s03v1025,
  title = {GEOLOGICAL EXPLORATIONS INVESTMENTS WHAT DOES IT WORTH  (REVIEW OF KOLUBARA COAL MINES, SERBIA)},
  author = {Vuckovic, Bogoljub and Nesic, Dusko and Andjelkovic, Nikola},
  booktitle = {SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; SGEM2012 12th International Multidisciplinary Scientific GeoConference},
  year = {2012},
  pages = {593 - 602 pp},
  publisher = {Stef92 Technology},
  doi = {10.5593/sgem2012/s03.v1025}
}