1. A Practical Guide to Splines;de Boor,2001
2. Spline approximation by quasi-interpolants;de Boor;J. Approx. Theory,1973
3. Construction of real-time spline quasi-interpolation schemes;Chen;Approx. Theory Appl.,1988
4. Multivariate Splines;Chui,1988
5. An Introduction to Wavelets;Chui,1992