TY  - JOUR
AU  - V. A. Pliss
TI  - On the theory of invariant sets in periodic systems of differential equations
JO  - Differencialʹnye uravneniâ
PY  - 1969
SP  - 215
EP  - 227
VL  - 5
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1969_5_2_a0/
LA  - ru
ID  - DE_1969_5_2_a0
ER  -