1. Zadeh L. A. (1994) Fuzzy logic, neural networks, and soft computing. Com-munications of the ACM, 37:77–84.
2. Pal S. K., Pal N. R. (1996) Soft computing : goals , tools and feasibility. Jour-nal of Institute of Electronics and Telecommunication Engineering, 42:335–347.
3. Gonzalez R. C., Woods R. E. (1993) Digital Image Processing. Addison-Wesley, Reading, MA.
4. Rosenfeld A., Kak A. C. (1992) . Digital Picture Processing. Academic Press, New York.
5. Zadeh L. A. (1965) Fuzzy sets. Information and Control, 8:338–353.