References
- Clements , D.L. and Rizzo , F.J. 1978 . A method for the numerical solutions of boundary value problems governed by second-order elliptic systems . J. Inst. Maths. Applies , 22 : 197 – 202 .
- Jaswon , M.A. and Ponter , A.R. 1963 . An integral equation solution of the torsion problem . Proc. Roy. Soc. A , 273 : 237 – 246 .
- Symm , G.T. 1963 . Integral equation methods in potential theory II . Proc. Roy. Soc. A , 275 : 33 – 46 .