%0 Journal Article %A M. M. Khapaev %T A generalization of Ljapunov's second method %J Differencialʹnye uravneniâ %D 1973 %P 2020-2028 %V 9 %N 11 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1973_9_11_a10/ %G ru %F DE_1973_9_11_a10