TY - CPAPER AU - Mladen Zrinjski TI - METHODS OF DETECTING THE UNDERGROUND INFRASTRUCTURE OBJECTS T2 - SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; SGEM2012 12th International Multidisciplinary Scientific GeoConference PY - 2012 DO - 10.5593/sgem2012/s07.v2013 PB - Stef92 Technology ER -