[1] PAWLAK Z. Vagueness and uncertainty: A Rough Set Prospective[J]. Inter. J. of Computer Interlligence, 1995, 11(2):227-232.
[2] David Eppstein. Fast hierarchical clustering and other applications of dynamic closest pairs[C]. Proceedings of the Ninth Annual ACM-SIAM Symposium on Discrete Algorithms, 619-628, California:San Francisco, 1998, 25-27.
[3] Pal N R, Bezdek J C. On cluster validity for the fuzzy c-means model[J]. IEEE Transactions on Fuzzy Systems 3, 1995, 3:370-379.
[4] Choubey S K, Deogun J S, Raghavan V V, et al. A comparison of feature selection algorithms in the context of rough classifiers[C]. Proceedings of the Fifth IEEE International Conference on, 1996, 2: 1122-1128.
[5] Fu shixing, Lu Zengxiang, Lu Haiming, et al. Rough set theory and its practice in knowledge discovery[C]. Proceedings of the 3rd World Congress on Intelligent Control and Automation. 2000, 2535-2539.
[6] Gonzalez R C, Woods R E. Digital Image Processing[M]. 3 edition, Addison Wesley Publishing Company, 1992.