1. Boundary Elements Techniques;Brebbia,1984
2. The Finite Element Method;Zienkiewicz,1977
3. The Finite Element Method for Elliptic Problems;Ciarlet,1971
4. R. Gruber, Finite elements in physics, in: Proceedings of the First European Graduate Summer Course in Computational Physics, North-Holland, Amsterdam, 1987
5. C. Brebbia, Topics in Boundary Element Research, vol. 3, Springer, Berlin