1. Fuzzy portfolio optimization a quadratic programming approach;Ammar;Chaos Solitons Fractals,2003
2. On quadratic programming;Beale;Nav. Res. Logistics Q.,1959
3. Fuzzy mathematical programming and fuzzy matrix games;Bector,2005
4. Decision making in a fuzzy environment;Bellman;Manage. Sci.,1970
5. A.B. Berkelaar, B. Jansen, C. Roos, T. Terlaky, Sensitivity analysis in (degenerate) quadratic programming, Reports of the Faculty of Applied Mathematics and Computer Science, no. 96-26, 1996.