TY  - JOUR
AU  - Timoumi,  Mohsen
TI  - Existence of periodic solutions for sub-linear first-order Hamiltonian systems
JO  - Electronic journal of differential equations
PY  - 2015
VL  - 2015
UR  - http://geodesic.mathdoc.fr/item/EJDE_2015__2015__a84/
LA  - en
ID  - EJDE_2015__2015__a84
ER  -