Geodesic
Approximation of functions with a~given modulus of continuity by certain trigonometric polynomials
Izvestiâ vysših učebnyh zavedenij. Matematika, no. 6 (1970), pp. 46-62.

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@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/}
}
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M. A. Vorob'eva. Approximation of functions with a~given modulus of continuity by certain trigonometric polynomials. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 6 (1970), pp. 46-62. http://geodesic.mathdoc.fr/item/IVM_1970_6_a5/