%0 Journal Article %A È. I. Grudo %A L. A. Poplavskaya %T The structure of the solutions of a two-dimensional periodic differential system.~II %J Differencialʹnye uravneniâ %D 1981 %P 395-410 %V 17 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1981_17_3_a0/ %G ru %F DE_1981_17_3_a0