1. Decision-making in a fuzzy environment;Bellman;Management Sci.,1970
2. A possibilistic approach to selecting portfolios with highest utility score;Carlsson;Fuzzy Sets and Systems,2002
3. M. Delgado, J. Kacprzyck, J.L. Verdegay, A. Vila (Eds.), Fuzzy Optimization: Recent Advances, Physica-Verlag, Heidelberg, 1994.
4. The mean value of a fuzzy number;Dubois;Fuzzy Sets and Systems,1987
5. Fuzzy numbers: an overview;Dubois,1988