References
- Demirci M. 2002 Fundamentals of M-vague algebra and M-vague arithmetic operations Int. J. Uncertainty, Fuzziness Knowledge-Based Syst. 10 1 25 75
- Demirci M. 2003a Foundations of fuzzy functions and vague algebra based on many-valued equivalence relations, Part I: fuzzy functions and their applications Int. J. Gen. Syst. 32 123 155
- Demirci M. 2003b Foundations of fuzzy functions and vague algebra based on many-valued equivalence relations, Part II: vague algebraic notions Int. J. Gen. Syst. 32 157 175
- Klawonn F. 1994 Fuzzy sets and vague environments Fuzzy Sets Syst. 66 207 221