References
- Advances in Fuzzy Theory and Technology v.Ⅱ Semigroups of fuzzy finite state machines D.S.Malik;J.N.Mordeson;M.K.Sen;P.P.Wang(ed.)
- Pacific J.Math. v.10 Satistical metric spaces B.Schweizer;A.Sklar
- Ph.D.Thesis, Purdue Univ. On generalizations of adaptive algorithm and application of the fuzzy sets concept to pattern classification W.G.Wee
- Inform.Control v.8 Fuzzy sets L.A.Zadeh