TY  - JOUR
AU  - A. K. Demenchuk
TI  - Periodic solutions of differential systems whose period is incommensurable with the period of the system itself
JO  - Differencialʹnye uravneniâ
PY  - 1990
SP  - 2167
EP  - 2170
VL  - 26
IS  - 12
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1990_26_12_a19/
LA  - ru
ID  - DE_1990_26_12_a19
ER  -