TY - JOUR AU - V. A. Pliss TI - Analysis of the necessity of the conditions of Smale and Robbin for structural stability for periodic systems of differential equations JO - Differencialʹnye uravneniâ PY - 1972 SP - 972 EP - 983 VL - 8 IS - 6 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1972_8_6_a3/ LA - ru ID - DE_1972_8_6_a3 ER -