%0 Journal Article %A G. S. Osipenko %T Perturbation of dynamical systems near invariant manifolds.~II %J Differencialʹnye uravneniâ %D 1980 %P 620-628 %V 16 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1980_16_4_a3/ %G ru %F DE_1980_16_4_a3