%0 Journal Article %A E. S. Polovinkin %A G. V. Smirnov %T An approach to differentiation of multivalued mappings, and necessary conditions for optimality of solutions of differential inclusions %J Differencialʹnye uravneniâ %D 1986 %P 944-954 %V 22 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1986_22_6_a3/ %G ru %F DE_1986_22_6_a3