Engel, VolkerKreibich, ThomasLein, Manfred2004-12-032004-12-0320012001http://hdl.handle.net/2003/95710.17877/DE290R-3841enThe American Physical SocietyPhysical Review Letters530Even-Harmonic Generation due to Beyond-Born-Oppenheimer Dynamics10.1103/PhysRevLett.87.103901article (journal)