1S.Chanas.On the Interval Approximation of a Fuzzy Number[J]. Fuzzy Sets and Systems,2001,122(2).
2P.Grzegorzewski.Nearest Interval Approximation of a Fuzzy Number[J].Fuzzy Sets and Systems,2002,130(3).
3M.Ma.,et al.Correction to a New Approach for Defuziification[J]. Fuzzy Sets and Systems,2002,128(1).
4M.Ma.,et al.A New Approximation for Defuzzification [J].Fuzzy Sets and Systems,2000,111(3).
5A.Ban.Approximattion of Fuzzy Numbers by Trapeziondal Fuzzy Numbers Preseving the Expected Interval[J].Fuzzy Sets and Systems,2008,159(11).
6Przemyslaw Grzegorzewkki.Trapezoidal Approximation of Fuzzy Numbers Preseving the Expected Interval-algorithms and Properties[J].Fuzzy Sets and Systems,2008,159(11).
7Chi-Tsuen Yeh.Trapezoidal and Triangular Approximations Preseving the Expected Interval[J].Fuzzy Sets and Systems,2008,159(11).
8D.Dubios,H. Prade. Opertions on Fuzzy Numbers [J].Intd.Syst.Sci, 1978,9(2).
9R.Goetschel,W.Voxman.Elementary Fuzy Calaclus[J].Fuzzy Sets and Systems, 1986,18( 1 ).
10Carlsson C,Fuller R.On Possibilistic Mean Value and Variance of Fuzzy Numbers[J].Fuzzy Sets and Systerms,2001,122.
