1. On a problem concerning moduli of smoothness;Boman,1976
2. A Practical Guide to Splines;DeBoor,1978
3. Approximation of splines and its application to Lipschitz classes and to stochastic processes;Ciesielski,1977
4. The Approximaton of Continuous Functions by Positive Linear Operators;DeVore,1972
5. Inverse theorems for functions in Lp and other spaces;Ditzian,1976