TY - CPAPER AU - International authors TI - 13th International Multidisciplinary Scientific GeoConference SGEM 2013, Ecology, Environmental Economics, Education, and Legislation, Vol. 13, Book 5, Volume 2 T2 - International Multidisciplinary Scientific GeoConference SGEM 2013 PY - 2013 DO - 10.5593/sgem2013/be5.v2 PB - STEF92 Technology ER -