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@article{MZM_1980_28_6_a4, author = {A. I. Ermakov}, title = {Best {Hausdorff} approximations by algebraic polynomials and continuity of a function}, journal = {Matemati\v{c}eskie zametki}, pages = {843--858}, publisher = {mathdoc}, volume = {28}, number = {6}, year = {1980}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1980_28_6_a4/} }
A. I. Ermakov. Best Hausdorff approximations by algebraic polynomials and continuity of a function. Matematičeskie zametki, Tome 28 (1980) no. 6, pp. 843-858. http://geodesic.mathdoc.fr/item/MZM_1980_28_6_a4/