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