TY  - JOUR
AU  - Chan Chi-fen
TI  - On the uniqueness of the limit cycles of some non-linear oscillation equations
JO  - Doklady Akademii Nauk
PY  - 1958
SP  - 659
EP  - 662
VL  - 119
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1958_119_4_a8/
LA  - ru
ID  - DAN_1958_119_4_a8
ER  -