TY  - JOUR
AU  - È. I. Grudo
AU  - L. A. Poplavskaya
TI  - The structure of the solutions of a two-dimensional periodic differential system.~I
JO  - Differencialʹnye uravneniâ
PY  - 1980
SP  - 1559
EP  - 1580
VL  - 16
IS  - 9
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1980_16_9_a2/
LA  - ru
ID  - DE_1980_16_9_a2
ER  -