@article{DAN_1973_210_2_a5,
     author = {R. A. Raitsin},
     title = {On the best approximation of a class of functions by algebraic polynomials},
     journal = {Doklady Akademii Nauk},
     pages = {274--277},
     publisher = {mathdoc},
     volume = {210},
     number = {2},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1973_210_2_a5/}
}