TY  - JOUR
AU  - S. A. Telyakovskii
TI  - Norms of trigonometrical polynomials and approximation of differentiable functions by averages of their Fourier series.~I
JO  - Trudy Matematicheskogo Instituta imeni V.A. Steklova
PY  - 1961
SP  - 61
EP  - 97
VL  - 62
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/TM_1961_62_a2/
LA  - ru
ID  - TM_1961_62_a2
ER  -