TY  - JOUR
AU  - V. S. Medvedev
TI  - Sufficient conditions for the absence of integral cycles for dynamical systems on manifolds
JO  - Differencialʹnye uravneniâ
PY  - 1970
SP  - 454
EP  - 466
VL  - 6
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1970_6_3_a7/
LA  - ru
ID  - DE_1970_6_3_a7
ER  -