1. Methods and Applications of Interval Analysis;Moore,1979
2. On Fuzzy Mappings and Control, Fuzzy Sets, Fuzzy Logic, and Fuzzy Systems;Chang,1996
3. Operations on fuzzy numbers
4. Intuitionistic fuzzy sets
5. A Unifying Field in Logics Neutrosophy: Neutrosophic Probability, Set and Logic;Smarandache,2003