@inbook {2007, title = {Concentration phenomena for nonlinear Schr{\"o}dinger equations: Recent results and new perspectives}, booktitle = {Perspectives in Nonlinear Partial Differential Equations: In Honor of Ha{\"\i}m Brezis / ed. by Henri Beresticky [et al.]. - Providence : American Mathematical Society, 2007. - (Contemporary mathematics ; 446). - p. 19-30}, year = {2007}, publisher = {American Mathematical Society}, organization = {American Mathematical Society}, abstract = {We survey some results on (NLSepsilon), discussing also new perspectives and open problems.}, url = {http://hdl.handle.net/1963/3516}, author = {Antonio Ambrosetti and Andrea Malchiodi} }