A Characterization of Optimal Fuzzy Sets in Fuzzy Optimization. - Sie-Keng Tan; Pei-Zhuang Wang (J. Intell. Fuzzy Syst., 1993)

Responses to Elkan (Pei-Zhuang Wang, Sie-Keng Tan, Shaohua Tan). - Pei-Zhuang Wang; Sie-Keng Tan; Shaohua Tan (IEEE Expert, 1994)