1. Good approximation by splines with variable knots;deBoor,1973
2. H. Kaneko and R. Noren, An application of approximation theory to numerical solutions for Fredholm integral equations of the second kind, submitted.
3. H. Kaneko and Y. Xu, Numerical solutions for weakly singular Fredholm integral equations of the second kind, to appear in IMACS Numerical Applied Mathematics.
4. On the degree of convergence of nonlinear spline approximation;Rice,1969