TY - JOUR T1 - Multiple bound states for the Schroedinger-Poisson problem JF - Commun. Contemp. Math. 10 (2008) 391-404 Y1 - 2008 A1 - Antonio Ambrosetti A1 - David Ruiz UR - http://hdl.handle.net/1963/2679 U1 - 1421 U2 - Mathematics U3 - Functional Analysis and Applications ER -