@inproceedings{sgem2018s17071,
  title = {PHOTOVOLTAIC ENERGY SYSTEMS - AN ENVIRONMENTALLY FRIENDLY SOLUTION FOR A COAL MINE},
  author = {Ilie Ciprian Jitea},
  booktitle = {SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 18th International Multidisciplinary Scientific GeoConference SGEM2018, Energy and Clean Technologies},
  year = {2018},
  pages = {545-554},
  publisher = {STEF92 Technology},
  doi = {10.5593/sgem2018/4.1/s17.071}
}