TY  - JOUR
AU  - Liao, Fang-Fang
TI  - Periodic orbits with small angular momentum for singular radially symmetric systems
JO  - Electronic Journal of Differential Equations
PY  - 2014
VL  - 2014
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/EJDE_2014__2014__a53/
LA  - en
ID  - EJDE_2014__2014__a53
ER  -