Cirac, J. I.Giedke, G.Kraus, B.Lewenstein, M.2004-12-032004-12-0320012001http://hdl.handle.net/2003/135210.17877/DE290R-11145enThe American Physical SocietyPhysical Review Letters530Entanglement Criteria for All Bipartite Gaussian States10.1103/PhysRevLett.87.167904article (journal)