@inproceedings{sgem201814,
  title = {18th International Multidisciplinary Scientific GeoConference SGEM 2018, Science and Technologies in Geology, Exploration and Mining, Vol. 18, Issue 1.4},
  author = {International authors},
  booktitle = {International Multidisciplinary Scientific GeoConference SGEM 2018},
  year = {2018},
  pages = {},
  publisher = {STEF92 Technology},
  doi = {10.5593/sgem2018/1.4}
}