Ivan Kunchev. "ACCESS AND MANAGEMENT GEOSPATIAL DATA IN MODEL-BASED GIS AND MAPPING SOFTWARE IN CONFORMITY WITH BULGARIAN REGULATIONS IN GEODESY CARTOGRAPHY AND CAD." SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 16th International Multidisciplinary Scientific GeoConference SGEM2016, Informatics, Geoinformatics and Remote Sensing (2016). https://doi.org/10.5593/sgem2016/b21/s08.072