@article{EJDE_2015__2015__a40,
     author = {Ferrara, Massimiliano and Hadjian, Armin},
     title = {Variational approach to fractional boundary value problems with two control parameters},
     journal = {Electronic Journal of Differential Equations},
     publisher = {mathdoc},
     volume = {2015},
     year = {2015},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2015__2015__a40/}
}