1. ‘Report on direct current power transmission discussed at internation conferences’, Direct Current, CIGRE, 1964 p. 76 9
2. Brameller, A., John, M.N., and Scott, M.R.: Practical diakoptics for electrical networks, (Chapman & Hall 1969)
3. Nobel, B.: Numerical methods. Vol. 2—Differences integration and differential equation, (Oliver & Boyd 1964)
4. Lance, G.: Numerical methods for high speed computers, (Iliffe 1960)