1. Broomfield, J.P.: ‘Corrosion of steel in concrete’, (Spon 1996), p. 5–9
2. Sunde, E.D.: ‘Earth conduction effects in transmission systems’, (Dover Publications Inc., New York 1968), p. 184–196
3. ‘CDEGS Software’: Safe Engineering Services & Technologies Ltd., Montreal, Quebec, Canada
4. Oslon, A.B., and Stankeeva, I.N.: ‘Application of optical analogy to calculation of electric fields in multilayer media’, Electric Technology, USSR 1979, No. 4
5. Stray Current Control in DC Mass Transit Systems