@article{TRSPY_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 = {Informatics and Automation},
     pages = {61--97},
     publisher = {mathdoc},
     volume = {62},
     year = {1961},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_1961_62_a2/}
}