%0 Journal Article %A G. S. Osipenko %T Perturbation of invariant manifolds. II %J Differencialʹnye uravneniâ %D 1985 %P 1337-1344 %V 21 %N 8 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1985_21_8_a6/ %G ru %F DE_1985_21_8_a6