@proceedings{sgem2015b41,
  title = {15th International Multidisciplinary Scientific GeoConference SGEM 2015, Energy and Clean Technologies, Vol. 15, Book 4, Volume 1},
  author = {International authors},
  year = {2015},
  publisher = {STEF92 Technology},
  isbn = {},
  doi = {10.5593/sgem2015/b41}
}