Doneva, Blagica, Delipetrev, Marjan, Delipetrov, Todor, Dimov, Gjorgi (2012). GEOELECTRICAL MEASUREMENTS WITH TERRAMETER SAS 1000. SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; SGEM2012 12th International Multidisciplinary Scientific GeoConference, 563 - 568 pp. https://doi.org/10.5593/sgem2012/s06.v2004