1. Investigation and testing of footing-type grounding electrodes for electrical installations;Ufer;IEEE Trans. Power Apparatus Syst.,1964
2. H. Markiewicz, A. Klajn, Earthing Systems—Fundamentals of Calculation and Design, J Copper Development Association IEE Endorsed Provider, 2003.
3. Military Handbook Grounding, Bonding, and Shielding for Electronic Equipments and Facilities, Department of Defense, Washington, DC, 1987.
4. Numerical analysis of a class of foundation grounding systems;Kostic;IEE Proc.,1990
5. Analysis of foundation grounding systems with external loops and rods;Kostic;IEE Proc.,1993