1. Theory of Approximation;Achieser,1956
2. Introduction to Approximation Theory;Cheney,1966
3. Interpolation and Approximation;Davis,1963
4. Lectures on theory of approximation;Golomb,1962
5. Evaluation approchée de la Meilleure Approximation Polynomiale d'Ordre n de ƒ (x) sur un Segment Fini [a, b];Hornecker;Chiffres,1958