TY  - JOUR
AU  - E. D. Zhitelzeif
TI  - The limit cycles of a certain autonomous system
JO  - Differencialʹnye uravneniâ
PY  - 1971
SP  - 1967
EP  - 1973
VL  - 7
IS  - 11
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1971_7_11_a3/
LA  - ru
ID  - DE_1971_7_11_a3
ER  -