1. Convergence properties of the spline fit;Ahlberg;J. SIAM,1963
2. Convergence of cubic spline interpolants of functions possessing discontinuities;Andria;J. Approximation Theory,1973
3. On the order of convergence of natural cubic spline interpolation;Atkinson;SIAM J. Numer. Anal.,1968
4. Error bounds for spline interpolation;Birkhoff;J. Math. Mech.,1964
5. On uniform approximation by splines;de Boor;J. Approximation Theory,1968