@article{EJDE_2015__2015__a73,
     author = {Yang,  Aijun and Henderson,  Johnny and Nelms,  Charles jun.},
     title = {Extremal points for a higher-order fractional boundary-value problem},
     journal = {Electronic journal of differential equations},
     year = {2015},
     volume = {2015},
     zbl = {1334.34023},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2015__2015__a73/}
}