%0 Journal Article %A V. D. Batukhtin %T On a~problem on the extremum of discontinuous mappings %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1986 %V 41 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/RM_1986_41_2_a30/ %G ru %F RM_1986_41_2_a30