@proceedings{sgem201961,
  title = {19th International Multidisciplinary Scientific GeoConference SGEM 2019, Nano, Bio, Green and Space Technologies for a Sustainable Future, Vol. 19, Issue 6.1},
  author = {International authors},
  year = {2019},
  publisher = {STEF92 Technology},
  isbn = {},
  doi = {10.5593/sgem2019/6.1}
}