TY  - JOUR
AU  - Minhós, Feliz
TI  - Periodic solutions for a third order differential equation under conditions on the potential.
JO  - Portugaliae mathematica
PY  - 1998
SP  - 475
EP  - 484
VL  - 55
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/PORMA_1998__55_4_48260/
LA  - en
ID  - PORMA_1998__55_4_48260
ER  -