1. Theory of Fuzzy Integrals and Its Applications;Sugeno,1974
2. Fuzzy sets;Zadeh;Inform. and Control,1965
3. Fuzzy sets as a basis for a theory of possibility;Zadeh;Fuzzy Sets and Systems,1978
4. The fuzzy integral;Ralescu;J. Math. Anal. Appl.,1980
5. D. Ralescu, A possibility measure is not a fuzzy measure, to appear.