Vadim Gostev. VIRTUAL LABORATORY "GEOINFORMATION SYSTEMS". SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 18th International Multidisciplinary Scientific GeoConference SGEM2018, Ecology, Economics, Education and Legislation, 2018, pp. 337-344. https://doi.org/10.5593/sgem2018/5.4/s22.043