%0 Journal Article %A R. È. Vinograd %A N. A. Izobov %T Solution of the Ljapunov stability problem by the first approximation %J Differencialʹnye uravneniâ %D 1970 %P 230-242 %V 6 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1970_6_2_a1/ %G ru %F DE_1970_6_2_a1