1. Sur la meilleure approximation de ∣x∣ par des polynômes des degrés donnés;Bernstein;Acta Math.,1913
2. Extremal Properties of Polynomials and the Best Approximation of Continuous Functions of a Single Real Variable;Bernstein,1937
3. Sur la meilleure approximation de ∣x∣p par des polynômes de degrés trés élevés;Bernstein;Bull. Acad. Sci. USSR Sér. Math.,1938
4. On the best approximation of continuous functions on the real axis by means of entire functions of given degree 5;Bernstein;Dokl. Akad. Nauk SSSR,1946
5. New derivation and generalization of certain formulae of best approximation;Bernstein;Dokl. Akad. Nauk SSSR,1946