1. R. A. Adams and J. J. F. Fournier, Sobolev Spaces, 2nd edn., Pure and Applied Mathematics, vol. 140, Academic Press, Amsterdam, 2003.
2. A. Bogomolny, Fundamental solutions method for elliptic boundary value problems, SIAM J. Numer. Anal., 22 (1985), pp. 644–669.
3. P. J. Davis, Circulant Matrices, A Wiley–Interscience Publication, Pure and Applied Mathematics, John Wiley & Sons, New York–Chichester–Brisbane, 1979.
4. G. Fairweather and A. Karageorghis, The method of fundamental solutions for elliptic boundary value problems. Numerical treatment of boundary integral equations, Adv. Comput. Math., 9 (1998), pp. 69–95.
5. G. Fairweather, A. Karageorghis, and P. A. Martin, The method of fundamental solutions for scattering and radiation problems, Eng. Anal. Bound. Elem., 27 (2003), pp. 759–769.