%0 Journal Article %A S. A. Telyakovskii %T An estimate of the norm of a function by its Fourier coefficients that is suitable in problems of approximation theory %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1971 %P 65-97 %V 109 %I mathdoc %U http://geodesic.mathdoc.fr/item/TM_1971_109_a5/ %G ru %F TM_1971_109_a5