%0 Journal Article %A M. M. Khapaev %A O. P. Filatov %T Stability of resonance problems %J Differencialʹnye uravneniâ %D 1981 %P 949-953 %V 17 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1981_17_5_a26/ %G ru %F DE_1981_17_5_a26