%0 Journal Article %A Yu. A. Kuznetsov %A E. F. Sabaev %T Estimates of the solutions of nonlinear differential equations in a phase space, and the stability of invariant sets %J Differencialʹnye uravneniâ %D 1978 %P 212-222 %V 14 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1978_14_2_a2/ %G ru %F DE_1978_14_2_a2