@inproceedings{sgem2017s06093,
  title = {NATURAL AND DRILLING INDUCED FACTORS INFLUENCING THE BRITTLENESS ESTIMATION BASED ON SONIC LOGS},
  author = {Bartlomiej Liana and Bartosz Papiernik},
  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 = {741-748},
  publisher = {STEF92 Technology},
  doi = {10.5593/sgem2017/14/s06.093}
}