%0 Journal Article %A A. M. Bogomolov %A Al. A. Privalov %A P. L. Ul'yanov %T Second Saratov Winter School on the Theory of Functions and Approximations %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1985 %V 40 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/RM_1985_40_1_a33/ %G ru %F RM_1985_40_1_a33