%0 Journal Article %A S. M. Nikol'skii %A A. M. Bogomolov %A Al. A. Privalov %T Sixth Saratov Winter School on Theory of Functions and Approximations %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1993 %V 48 %N 4 %U http://geodesic.mathdoc.fr/item/RM_1993_48_4_a15/ %G ru %F RM_1993_48_4_a15