1. The C2 quartic spline space on a four-directional mesh;Chui;Approx. Theory Appl.,1987
2. Curves and Surfaces for Computer Aided Geometric Design, A Practical Guide;Farin,1993
3. The NURBS Book;Piegl,1997
4. The structural characterization and interpolation for multivariate splines;Wang;Acta Math. Sinica,1975
5. Multivariate Spline Functions and their Applications;Wang,2001