Chromcak, Jakub, ., Peter Pisca, ., Michal Grinc. "MICROGRAVITY AND GPR DETECTION OF UNDERGROUND CAVITIES IN HISTORICAL SITES." SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 16th International Multidisciplinary Scientific GeoConference SGEM2016, Informatics, Geoinformatics and Remote Sensing (2016): 435-440. https://doi.org/10.5593/sgem2016/b22/s09.056