@inproceedings{sgem2013s03043,
  title = {NEW DEVICES USED IN DETERMINING AND ASSESSING MECHANICAL CHARACTERISTICS OF COAL},
  author = {hab. Witold BIALY Pol. Sl.},
  booktitle = {SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 13th SGEM GeoConference on SCIENCE AND TECHNOLOGIES IN GEOLOGY, EXPLORATION AND MINING},
  year = {2013},
  pages = {547 - 554 pp},
  publisher = {Stef92 Technology},
  doi = {10.5593/sgem2013/ba1.v1/s03.043}
}