%0 Journal Article %A V. M. Šalov %T A variational principle in game theory and in optimal control problems %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1975 %P 370-388 %V 134 %U http://geodesic.mathdoc.fr/item/TM_1975_134_a26/ %G ru %F TM_1975_134_a26