1. Decisions with Multiple Objectives: Preference and Value Tradeoffs;Keeney,1976
2. Multiobjective Decision Making: Theory and Methdology;Chankong,1983
3. Fuzzy Sets, Decision Making, and Expert Systems;Zimmermann,1987
4. Decision making in a fuzzy environment;Bellman;Mgmt Sci.,1970
5. Rating and ranking of multiple-aspect alternatives using fuzzy sets;Baas;Automatica,1977