TY - JOUR AU - È. I. Grudo AU - L. A. Poplavskaya TI - The structure of the solutions of a two-dimensional periodic differential system.~II JO - Differencialʹnye uravneniâ PY - 1981 SP - 395 EP - 410 VL - 17 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1981_17_3_a0/ LA - ru ID - DE_1981_17_3_a0 ER -