Rong Yang Zhenyuan Wang Pheng-Ann Heng Kwong-Sak Leung Classification of Heterogeneous Fuzzy Data by Choquet Integral With Fuzzy-Valued Integrand. 931-942 2007 15 IEEE T. Fuzzy Systems 5 http://dx.doi.org/10.1109/TFUZZ.2006.890658 db/journals/tfs/tfs15.html#YangWHL07