%0 Journal Article %A Jin, Jingfu %A Liu, Xiping %A Jia, Mei %T Existence of positive solutions for singular fractional differential equations with integral boundary conditions %J Electronic journal of differential equations %D 2012 %V 2012 %U http://geodesic.mathdoc.fr/item/EJDE_2012__2012__a95/ %G en %F EJDE_2012__2012__a95