%0 Journal Article %A N. N. Krasovskii %T Differential games. Approximation and formal models %J Sbornik. Mathematics %D 1979 %P 795-822 %V 35 %N 6 %U http://geodesic.mathdoc.fr/item/SM_1979_35_6_a2/ %G en %F SM_1979_35_6_a2