4Bates J.M., Granger C.W.J.Combination of Forecasts[J].Operations Research Quarterly, 1969,20(4).
5ZeShuiXu, QingLi Da. An Overview of Operators for Aggregating Information[J].International Journal of Intelligent Systems,2003,(18).
6Bates J M, Granger C W J. The comination of forecasts[J]. Operations Research Quarterly, 1969(12):319-325.
7Tanaka H, Uejima S, Asai K. Fuzzy linear regression model[Z]. International Congress on Applied Systems Research and Cybernetics. Aculpoco, Maxico,1980.