@article{IVM_1970_6_a5,
     author = {M. A. Vorob'eva},
     title = {Approximation of functions with a~given modulus of continuity by certain trigonometric polynomials},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {46--62},
     publisher = {mathdoc},
     number = {6},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1970_6_a5/}
}