1作者：S. Heilpern,

标题 The expected value of a fuzzy number,

出处：Fuzzy Sets and Systems 47 (1992) 81-86.
 2 作者D. Dubois, H. Prade,

标题：The mean value of a fuzzy number,

出处Fuzzy Sets and Systems 24 (1987) 279-300.
3 作者W. Hung, J. Wu,

题目：A note on the correlation of fuzzy numbers by expected interval,

出处： Internat. J. Uncertainty Fuzziness and Knowledge-based Systems 9 (2001) 517-523.
4作者：D. Dubois, H. Prade,

标题：Operations on fuzzy numbers,

出处：Internat. J. Systems Sci. 9 (1978) 613-626.

[此贴子已经被作者于2009-3-17 23:42:27编辑过]