3Liang G S,Chou T Y,Han T C.Cluster analysis based on fuzzy equivalence relation[J].European Journal of Operational Research,2005,166(1):160-171.
4J Martínez F,Ruiz-Shulcloper J.Fuzzy clustering of semantic spaces[J].Pattern Recognition,2001,34(4):783-793.
5Pal S K.Fuzzy tools for the management of uncertainty in pattern recognition,image analysis,vision and expert systems[J].International Journal of Systems Science,1991,22(3):511-549.
6Lee H S.Automatic clustering of business processes in business systems planning[J].European Journal of Operational Research,1999,114(2):354-362.