@inproceedings{sgem2010paper,
  title = {MINING BY-PRODUCTS FROM LIGNITE OPEN PIT PESTEANA SUD, OLTENIA COAL BASIN},
  author = {A. Florea},
  booktitle = {10th International Multidisciplinary Scientific GeoConference SGEM2010},
  year = {2010},
  pages = {475-482},
  publisher = {SGEM Scientific GeoConference},
  doi = {}
}