1. Theoretical resistivity anomalies across a single vertical discontinuity;Al-Chalabi;Geophys. Prospect.,1969
2. Direct Current Geoelectric Sounding Principles and Interpretation;Bhattacharya,1968
3. Electrical methods in Geophysical Prospecting;Keller,1966
4. Variable azimuthal resistivity sounding and profiling with two-electrode system near a single vertical discontinuity;Kumar;Geophys. Res. Bull.,1973
5. Principles of Direct Current Resistivity Prospecting;Kunetz,1966