1. Sobolev Space;Adams,1975
2. Approximation of Elliptic Boundary-Value Problems;Aubin,1972
3. Approximation by hill functions;Babuǎka,1970
4. Element free Galerkin methods;Belytschko;Int. J. Numer. Methods Engrg.,1994
5. An Introduction to Wavelets;Chui,1992