1. Deutsch D., Jozsa R., Proc. R. Soc. London Ser. A 439, 553 (1985).
2. E. Bernstein and U. Vazirani in Proceedings of the 25th ACM Symposium on the Theory of Computation (ACM Press New York 1993) pp. 11–20.
3. D. R. Simon in Proceedings of the 35th Annual Symposium on Foundations of Computer Science (IEEE Press Los Alamitos CA 1994) pp. 116–123.
4. P. W. Shor in ibid. pp. 124–134.
5. Cirac J. I., Zoller P., Phys. Rev. Lett. 74, 4091 (1995).