TY  - JOUR
AU  - N. N. Butenina
TI  - Bifurcations of the separatrices and limit cycles of a two-dimensional dynamical system under a rotation of the field
JO  - Differencialʹnye uravneniâ
PY  - 1973
SP  - 1520
EP  - 1522
VL  - 9
IS  - 8
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1973_9_8_a15/
LA  - ru
ID  - DE_1973_9_8_a15
ER  -