1. C. H. Benett, G. Brassard, C. Crepeau, R. Jozsa, A. Peres, and W. K. Wootters, Phys. Rev. Lett., 70, 1895 (1993).
2. D. Bouwmeester, J.-W. Pan, M. Mattle, H. Weinfurter, and A. Zeilinger, Nature, 390, 575 (1997).
3. D. C. Rine (Editor), Computer Science and Multiple-Valued Logic: Theory and Applications, North Holland, Amsterdam (1984).
4. L. A. Zadeh, The Concept of a Linguistic Variable and Its Application to Approximate Reasoning, Elsevier, New York (1973).
5. E. Cox, The Fuzzy Systems Handbook, Academic Press, Cambridge, MA (1994).