1. Nielsen M A, Chuang I L. Quantum Computation and Quantum Information. Cambridge: Cambridge University Press, 2000. 167–216
2. Horodecki R, Horodecki P, Horodecki M, et al. Quantum entanglement. Rev Mod Phys, 2009, 81: 865–942
3. Chi D P, Lee S. Entanglement for a two-parameter class of states in 2⊗n quantum System. J Phys A, 2003, 36: 11503-1–11503-10
4. Liu S P, Di Y M. Relative entropy of entanglement for a two-parameter class of states in 2⊗n quantum System. Acta Sin Quantum Opt, 2008, 14: 208–212
5. Vidal G, Werner R F. A computable measure of entanglement. Phys Rev A, 2002, 65: 032314-1–032314-12