%0 Journal Article %A Ma, Ruyun %T Positive solutions of a nonlinear three-point boundary-value problem %J Electronic Journal of Differential Equations %D 1999 %V 1999 %I mathdoc %U http://geodesic.mathdoc.fr/item/EJDE_1999__1999__a134/ %G en %F EJDE_1999__1999__a134