참고문헌
- Fuzzy sets and Systems: Theory and Applications Dubois,D.;Prade,H.
- Int. J. Math-Machine Studies v.6 Concept representation in natural and artificial language: Axioms, Extensions and applications for fuzzy sets J.Goguen
- Memorandum ERL-M 411 Berkeley The concept of a linguistic variable and its application to approximate reasoning L.A.Zadeh