1. Bennett, C.H., Brassard, G.: In: Proceedings of IEEE International Conference on Computers, Systems and Signal Processing, Bangalore, India, p. 175. IEEE Press, New York (1984)
2. Ekert, A.K.: Phys. Rev. Lett. 67, 661 (1991)
3. Bennett, C.H., Brassard, G., Mermin, N.D.: Phys. Rev. Lett. 68, 557 (1992)
4. Long, G.L., Liu, X.S.: Phys. Rev. A 65, 032302 (2002)
5. Gao, F., Guo, F.Z., Wen, Q.Y., Zhu, F.C.: Phys. Lett. A 355, 172 (2006)