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2. O.C. Zienkiewicz, The Finite Element Method in Engineering, McGraw-Hill, London, 1971.
3. M.A. Jaswon and G.T. Symm, Integral Equation Methods in Potential Theory and Electrostatics, Academic Press, London, 1977.
4. P. Daly, “Singularities in Transmission Lines”, The Mathematics of Finite Elements and Applications, Brunei University, 1972.
5. J.R. Whiteman, “Numerical Solution of Steady-State Diffusion Problems Containing Singularities”, Proceedings of the International Symposium on Finite Elements in Flow Problems, Wiley, London, 1974.