@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},
     publisher = {mathdoc},
     volume = {2003},
     year = {2003},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2003__2003__a25/}
}