1. The order of approximation of continuous functions by HermiteFejér interpolation polynomials;Amelkovic,1961
2. On two-dimensional Bernstein polynomials;Butzer;Canad. J. Math.,1953
3. On interpolating cubic splines with equally spaced nodes;Cheney;Indag. Math.,1968
4. Convergence of cubic spline interpolants;Cheney;J.Approximation Theory,1970
5. Interpolation and Approximation;Davis,1965