%0 Journal Article %A Kh. G. Guseinov %T Strongly invariant sets with respect to a differential inclusion, and the approach problem for discontinuous control systems %J Differencialʹnye uravneniâ %D 1992 %P 1490-1498 %V 28 %N 9 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1992_28_9_a2/ %G ru %F DE_1992_28_9_a2