TY  - JOUR
AU  - Mehri, B.
TI  - A note on periodic solution of second order non-linear differential equations
JO  - Archivum mathematicum
PY  - 1977
SP  - 191
EP  - 194
VL  - 13
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/ARM_1977__13_4_a2/
LA  - en
ID  - ARM_1977__13_4_a2
ER  -