1. Sur les polynömes orthogonaux relatifs à un segment fini;Bernstein;J. Math.,1931
2. A note on the precision of interpolation by Hermite-Fejér polynomials;Bojanic,1972
3. Degree of approximation;De Vore,1979
4. Notes on interpolation, V;Egerváry;Acta Math. Acad. Sci. Hung.,1958
5. On the maximum of the fundamental functions of the ultraspherical polynomials;Erdös;Ann. of Math.,1944