@article{EJDE_2013__2013__a136,
     author = {Ferrara, Massimiliano and Guerrini, Luca and Zhang, Binlin},
     title = {Multiple solutions for perturbed non-local fractional {Laplacian} equations},
     journal = {Electronic Journal of Differential Equations},
     publisher = {mathdoc},
     volume = {2013},
     year = {2013},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2013__2013__a136/}
}