TY  - JOUR
AU  - Yuan, Yanyan
AU  - Zhao, Chenglong
AU  - Liu, Yansheng
TI  - Positive solutions for systems of nonlinear singular differential equations
JO  - Electronic Journal of Differential Equations
PY  - 2008
VL  - 2008
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/EJDE_2008__2008__a68/
LA  - en
ID  - EJDE_2008__2008__a68
ER  -