TY  - JOUR
AU  - G. L. Yuzbashev
TI  - A study of the set of periodic solutions of a certain system of second order differential equations without dissipation
JO  - Differencialʹnye uravneniâ
PY  - 1973
SP  - 1734
EP  - 1737
VL  - 9
IS  - 9
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1973_9_9_a22/
LA  - ru
ID  - DE_1973_9_9_a22
ER  -