1. W.L. Anderson, 1975 , Improved digital filters for evaluating Fourier and Hankel transform integrals , U.S.G.S. rep. USGS-GD-75-012. Available as NTIS rep. PB-242-800/IWC, 223 pp.
2. P.K. Battacharya, and H.P. Patra, 1968 , Direct Current Geoelectric Sounding , Elsevier, 135 pp.
3. INVERSE FILTER COEFFICIENTS FOR THE COMPUTATION OF APPARENT RESISTIVITY STANDARD CURVES FOR A HORIZONTALLY STRATIFIED EARTH*