Norms of trigonometrical polynomials and approximation of differentiable functions by averages of their Fourier series. I
Trudy Matematicheskogo Instituta imeni V.A. Steklova, Collection of articles on linear methods of summation of Fourier series, Tome 62 (1961), pp. 61-97
S. A. Telyakovskii. Norms of trigonometrical polynomials and approximation of differentiable functions by averages of their Fourier series. I. Trudy Matematicheskogo Instituta imeni V.A. Steklova, Collection of articles on linear methods of summation of Fourier series, Tome 62 (1961), pp. 61-97. http://geodesic.mathdoc.fr/item/TM_1961_62_a2/
@article{TM_1961_62_a2,
     author = {S. A. Telyakovskii},
     title = {Norms of trigonometrical polynomials and approximation of differentiable functions by averages of their {Fourier} {series.~I}},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {61--97},
     year = {1961},
     volume = {62},
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     url = {http://geodesic.mathdoc.fr/item/TM_1961_62_a2/}
}
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