%0 Journal Article %A Kh. G. Guseinov %T Strongly invariant sets and periodic solutions of a differential inclusion %J Differencialʹnye uravneniâ %D 1990 %P 1690-1699 %V 26 %N 10 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1990_26_10_a3/ %G ru %F DE_1990_26_10_a3