@proceedings{sgem201912,
  title = {19th International Multidisciplinary Scientific GeoConference SGEM 2019, Science and Technologies in Geology, Exploration and Mining, Vol. 19, Issue 1.2},
  author = {International authors},
  year = {2019},
  publisher = {STEF92 Technology},
  isbn = {},
  doi = {10.5593/sgem2019/1.2}
}