TY  - JOUR
AU  - Z. S. Batalova
AU  - N. V. Buhalova
TI  - Investigation of periodic solutions of a differential equation of pendulum type
JO  - Differencialʹnye uravneniâ
PY  - 1992
SP  - 516
EP  - 519
VL  - 28
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1992_28_3_a19/
LA  - ru
ID  - DE_1992_28_3_a19
ER  -