%0 Journal Article %A V. V. Zhuk %T On the order of approximation of a~continuous $2\pi$-periodic function by Fejer and Poisson means of its Fourier series %J Matematičeskie zametki %D 1968 %P 21-32 %V 4 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZM_1968_4_1_a2/ %G ru %F MZM_1968_4_1_a2