Acín, A.Bruß, D.Lewenstein, M.Sanpera, A.2004-12-032004-12-0320012001http://hdl.handle.net/2003/58510.17877/DE290R-10384enThe American Physical SocietyPhysical Review Letters530Classification of Mixed Three-Qubit States10.1103/PhysRevLett.87.040401article (journal)