@inproceedings{sgem2017s01075,
  title = {THE CONTENT OF RADIOACTIVE ELEMENTS IN THE POLISH LIGNITE AND ITS ASHES},
  author = {Barbara Bielowicz},
  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 = {597-604},
  publisher = {STEF92 Technology},
  doi = {10.5593/sgem2017/11/s01.075}
}