@article{EJDE_2014__2014__a21,
     author = {Ye,  Yiwei and Tang,  Chun-Lei},
     title = {Multiplicity of solutions for elliptic boundary value problems},
     journal = {Electronic journal of differential equations},
     year = {2014},
     volume = {2014},
     zbl = {1302.35175},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2014__2014__a21/}
}