1. The Theory of Splines and their Applications;Ahlberg,1967
2. Convergence of cubic spline interpolants;Cheney;J. Approximation Theory,1970
3. Error bounds for bicubic spline interpolation;Carlson;J. Approximation Theory,1973
4. Matrices and Linear Transformations;Cullen,1967
5. Spline interpolation near discontinuities;Golomb,1969