@inproceedings{sgem2015b11,
  title = {15th International Multidisciplinary Scientific GeoConference SGEM 2015, Science and Technologies in Geology, Exploration and Mining, Vol. 15, Book 1, Volume 1},
  author = {International authors},
  booktitle = {International Multidisciplinary Scientific GeoConference SGEM 2015},
  year = {2015},
  pages = {},
  publisher = {STEF92 Technology},
  doi = {10.5593/sgem2015/b11}
}