TY - JOUR AU - V. A. Pliss TI - The behavior of the solutions of a sequence of second order periodic systems with a small nonlinearity JO - Differencialʹnye uravneniâ PY - 1971 SP - 651 EP - 660 VL - 7 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1971_7_4_a7/ LA - ru ID - DE_1971_7_4_a7 ER -