1. Splines as linear combinations of B-splines;de Boor,1976
2. C. de Boor and R. DeVore, Approximation by smooth multivariate splines, Trans. Amer. Math. Soc., to appear.
3. Bivariate box splines and smooth pp functions on a three direction mesh;de Boor;J. Comput. Appl. Math.,1983
4. On spaces of piecewise polynomials with boundary conditions. I. Rectangles;Chui,1982
5. On spaces of piecewise polynomials with boundary conditions, II. Type-1 Triangulations;Chui;Canadian Math. Soc. Conf. Proc.,1983