@article{IVM_1976_1_a8,
     author = {R. A. Raitsin},
     title = {The best approximation of a certain class of differentiable functions by algebraic polynomials},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {64--74},
     publisher = {mathdoc},
     number = {1},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1976_1_a8/}
}