1. Development and use of an electrical resistivity cone for groundwater contamination studies;Campanella;Canadian Geotechnical Journal,1990
2. Campanella, R.G., Davies, M.P., Boyd, T.J., 1993. Characterizing contaminated soil and groundwater systems with in-situ testing. 1993 Joint CSCE–ASCE National Conference on Environmental Engineering, pp. 1497–1504.
3. The micro-structures of clay given by resistivity measurements;Fukue;Engineering Geology,1999
4. Development and application of cone for measuring the resistivity of soil;Fukue;Journal of Geotechnical Engineering, Japanese Society of Civil Engineers,1998