1. S. N. Bernstein, Leçons sur les propriétés extrémales et la meilleure approximaUon des fonctions analytiques d’une variable réelle, Gauthier-Villars, Paris, 1926.
2. E. W. Cheney, Introduction to approximation theory, McGraw-Hill, New York, 1966.
3. H. Fiedler and W. B. Jurkat, Best L -approximation by polynomials, J. Approximation Theory 37 (1983), 269–292.
4. M. L Kadec, On the distribution of points of maximal deviation in the approximation of continuous faru:tumsbypolyruymÍQls, Uspehi Mat. Nauk 15 (1960), 199–202.
5. J. H. B. Kemperman and G. G. Lorentz, Bounds for polynomials with applications, Indag. Math. 41 (1979), 13–26.