TY  - JOUR
AU  - Alwash,  Mohamad Ali M.
TI  - Complex centers of polynomial differential equations
JO  - Electronic journal of differential equations
PY  - 2007
VL  - 2007
UR  - http://geodesic.mathdoc.fr/item/EJDE_2007__2007__a33/
LA  - en
ID  - EJDE_2007__2007__a33
ER  -