Saracin, Aurel, Negrila, Aurel, Cosarca, Constantin, Savu, Adrian, Calin, Alexandru. "GEORADAR TECHNIQUE AND MICROTUNNELLING." SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 16th International Multidisciplinary Scientific GeoConference SGEM2016, Informatics, Geoinformatics and Remote Sensing (2016): 337-344. https://doi.org/10.5593/sgem2016/b22/s09.043