TY - JOUR AU - Salvatore, Addolorata AU - Squassina, Marco TI - Deformation from symmetry for Schrödinger equations of higher order on unbounded domains JO - Electronic Journal of Differential Equations PY - 2003 VL - 2003 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/EJDE_2003__2003__a25/ LA - en ID - EJDE_2003__2003__a25 ER -