%0 Journal Article
%A Yuan, Yanyan
%A Zhao, Chenglong
%A Liu, Yansheng
%T Positive solutions for systems of nonlinear singular differential equations
%J Electronic Journal of Differential Equations
%D 2008
%V 2008
%I mathdoc
%U http://geodesic.mathdoc.fr/item/EJDE_2008__2008__a68/
%G en
%F EJDE_2008__2008__a68