Benson, S. V.Biallas, G.Gubeli, J.Jordan, K.Neil, George R.2004-12-032004-12-0320012001http://hdl.handle.net/2003/84610.17877/DE290R-10703enThe American Physical SocietyPhysical Review Letters530Second Harmonic FEL Oscillation10.1103/PhysRevLett.87.084801article (journal)