@inproceedings{sgem2013s03081,
  title = {WAYS TO IMPROVE COAL EXTRACTION OPERATIONS IN LIGNITE OPEN PITS WITHIN OLENIA BASIN, ROMANIA},
  author = {Tudor, Ec. GOLDAN and Roland, MORARU and Catalin, NISTOR Marian},
  booktitle = {SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 13th SGEM GeoConference on SCIENCE AND TECHNOLOGIES IN GEOLOGY, EXPLORATION AND MINING},
  year = {2013},
  pages = {831 - 836 pp},
  publisher = {Stef92 Technology},
  doi = {10.5593/sgem2013/ba1.v1/s03.081}
}