@inproceedings{sgem2017s02017,
  title = {COAL MINE METHANE PRODUCTION BY VERTICAL BOREHOLES DRILLED FROM SURFACE},
  author = {Jacek Hendel and Jan Macuda},
  booktitle = {SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 17th International Multidisciplinary Scientific GeoConference SGEM2017, Science and Technologies in Geology, Exploration and Mining},
  year = {2017},
  pages = {127-134},
  publisher = {STEF92 Technology},
  doi = {10.5593/sgem2017/12/s02.017}
}