Hatsagortsyan; K. Z.Keitel, C. H.2004-12-142004-12-1420012001http://hdl.handle.net/2003/1861510.17877/DE290R-16245enThe American Physical SocietyPhysical Review Letters530X-Ray Amplification by Laser Controlled Coherent Bremsstrahlung10.1103/PhysRevLett.86.2277article (journal)