@article{EJDE_2003__2003__a25,
     author = {Salvatore,  Addolorata and Squassina,  Marco},
     title = {Deformation from symmetry for {Schr\"odinger} equations of higher order on unbounded domains},
     journal = {Electronic journal of differential equations},
     year = {2003},
     volume = {2003},
     zbl = {1037.35083},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2003__2003__a25/}
}