1. V. Chankong, Y.Y. Haimes, Multiobjective Decision Making Theory and Methodology, North Series in System Science and Engineering, New York, Amsterdam, Oxford, 1983.
2. Operations on fuzzy numbers;Dubois;Internat. J. Systems Sci.,1978
3. Fuzzy Sets and Systems, Theory and Applications;Dubois,1980
4. M.A. Fatma, An algorithm for finding all the efficient solutions of nonconvex (VOPS), Fifth Conference on ORMA, vol. I, 1993, pp. 20–36.
5. Technique for solving multiobjective nonlinear programming using differential equations approach;Fatma;J. Inform. Optim. Sci.,1997