1. Bennett, C.H., Brassard, G.: In: Proceedings of the IEEE International Conference on Computers, Systems and Signal Processings, Bangalore, India, p. 175. IEEE, New York (1984)
2. Beige, A., Engler, B.G., Kurtsiefer, C., Weinfurter, H.: Acta Phys. Pol. A 101, 357 (2002)
3. Long, G.L., Liu, X.S.: Phys. Rev. A 65, 032302 (2002)
4. Bostrom, K., Felbinger, T.: Phys. Rev. Lett. 89, 187902 (2002)
5. Deng, F.G., Long, G.L., Liu, X.S.: Phys. Rev. A 68, 042317 (2003)