%0 Journal Article %A Bajnov, Drumi D. %A Stamova, Ivanka M. %T Global stability of sets for impulsive differential-difference equations by Lyapunov's direct method %J Communications in Mathematics %D 1999 %P 7-22 %V 07 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/COMIM_1999__7_1_a0/ %G en %F COMIM_1999__7_1_a0