1. The theory of dipole sounding; Gostoptekhizdat, Moscow;Al'pin,1950
2. Groundwater exploration in fissured media with electrical and VLF methods;Bernard;Geoexploration,1991
3. Experimental and theoretical aspects of IP;Bertin,1976
4. Direct current geoelectric sounding;Bhattacharya,1968
5. A comparison of IP electrode arrays;Coggon;Geophysics,1973