TY  - JOUR
AU  - B. S. Kalitin
TI  - The limit cycles of pendulum systems with impulse perturbation
JO  - Differencialʹnye uravneniâ
PY  - 1971
SP  - 540
EP  - 542
VL  - 7
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1971_7_3_a18/
LA  - ru
ID  - DE_1971_7_3_a18
ER  -