%0 Journal Article %A G. S. Osipenko %T Submanifolds of codimension $1$ and the perturbation of homogeneous systems %J Differencialʹnye uravneniâ %D 1981 %P 2274-2277 %V 17 %N 12 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1981_17_12_a17/ %G ru %F DE_1981_17_12_a17