%0 Journal Article
%A È. I. Grudo
%A L. A. Poplavskaya
%T The structure of the solutions of a two-dimensional periodic differential system. I
%J Differencialʹnye uravneniâ
%D 1980
%P 1559-1580
%V 16
%N 9
%U http://geodesic.mathdoc.fr/item/DE_1980_16_9_a2/
%G ru
%F DE_1980_16_9_a2