%0 Journal Article %A S. B. Vakarchuk %T On the best linear approximation methods and the widths of certain classes of analytic functions %J Matematičeskie zametki %D 1999 %P 186-193 %V 65 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZM_1999_65_2_a2/ %G ru %F MZM_1999_65_2_a2