共 4 条
[1]
ERCEG MA, 1980, FUZZY SETS SYSTEMS, V3, P75
[2]
LIU YM, 1987, FUZZY SET SYST, V21, P43, DOI 10.1016/0165-0114(87)90151-5
[3]
Wang G., 1986, Acta Math. Sin., V4, P539