%0 Journal Article %A Yang, Aijun %A Henderson, Johnny %A Nelms, Charles jun. %T Extremal points for a higher-order fractional boundary-value problem %J Electronic Journal of Differential Equations %D 2015 %V 2015 %I mathdoc %U http://geodesic.mathdoc.fr/item/EJDE_2015__2015__a73/ %G en %F EJDE_2015__2015__a73