%0 Journal Article %A M. I. Gil' %T Stability of essentially nonlinear time-dependent systems %J Doklady Akademii Nauk %D 1989 %P 281-284 %V 308 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1989_308_2_a4/ %G ru %F DAN_1989_308_2_a4