@article{SM_1972_18_1_a8,
     author = {B. Kh. Sendov and V. A. Popov},
     title = {The exact asymptotic behavior of the best approximation by algebraic and trigonometric polynomials in the {Hausdorff} metric},
     journal = {Sbornik. Mathematics},
     pages = {139--149},
     year = {1972},
     volume = {18},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1972_18_1_a8/}
}