| 1 | Soft Computing: Integrating Evolutionary, Neural, and Fuzzy Systems by Andrea Tettamanzi, Marco Tomassini and J. Janßen (Dec 1, 2010) |
| 2 | An Introduction to Fuzzy Sets, Witold Pedrycz, Fernando Gomide, Massachusetts Institute of Technology,, USA, 1998 |
| 3 | Neural Fuzzy Systems, Chin-Teng Lin, C.S. George Lee, Prentice Hall,, New Jersey 1996 |