%0 Journal Article %A Zhang, Shuqin %T Existence of solutions for two-point boundary-value problems with singular differential equations of variable order %J Electronic Journal of Differential Equations %D 2013 %V 2013 %I mathdoc %U http://geodesic.mathdoc.fr/item/EJDE_2013__2013__a135/ %G en %F EJDE_2013__2013__a135