1. Multiple Objective Decision Making — Methods and Applications;Hwang,1979
2. Multiple Attribute Decision Making — Methods and Applications;Hwang,1981
3. Expert Choice Software Package for IBM PC;Forman,1983
4. Bicriteria linear fractional programming;Choo;J. Optimization Theory and Appl.,1982
5. Fuzzy Sets, Decesion Making and Expert Systems;Zimmermann,1987