%0 Journal Article %A Chen, Yun %A Yan, Baoqiang %A Zhang, Lili %T Positive solutions for singular three-point boundary-value problems with sign changing nonlinearities depending on $x'$ %J Electronic Journal of Differential Equations %D 2007 %V 2007 %I mathdoc %U http://geodesic.mathdoc.fr/item/EJDE_2007__2007__a101/ %G en %F EJDE_2007__2007__a101