Iotti, Rita ClaudiaRossi, Fausto2004-12-032004-12-0320012001http://hdl.handle.net/2003/122510.17877/DE290R-11042enThe American Physical SocietyPhysical Review Letters530Nature of Charge Transport in Quantum-Cascade Lasers10.1103/PhysRevLett.87.146603article (journal)