@inproceedings{sgem2017s01070,
  title = {SULPHUR IN POLISH LIGNITE DEPOSITS},
  author = {Barbara Bielowicz and Sandra Pawelec and Natalia Maciejonczyk},
  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 = {557-564},
  publisher = {STEF92 Technology},
  doi = {10.5593/sgem2017/11/s01.070}
}