TY  - JOUR
AU  - P. S. Belevets
TI  - A certain class of dynamical systems with two closed algebraic trajectories
JO  - Differencialʹnye uravneniâ
PY  - 1968
SP  - 1150
EP  - 1153
VL  - 4
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1968_4_6_a20/
LA  - ru
ID  - DE_1968_4_6_a20
ER  -