%0 Journal Article %A V. V. Shalaev %T Exact estimates of approximation of periodic functions by linear polynomial methods of convolution type %J Matematičeskie zametki %D 1983 %P 227-234 %V 33 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZM_1983_33_2_a7/ %G ru %F MZM_1983_33_2_a7