9Fung,B. C. M, Wang, K. & Ester,M. (2003). Hierarchical Document Clustering Using Frequent Itemsets [ A ]. In Proc. of the 3rd SIAM International Conference on Data Mining (SIAM DM 2003)[ C ], San Francisco, CA, May 1-3 ; 59-70.
10Glass, G. V. (1976). Primary, secondary, and Meta-analysis of research [ J ]. Educational Researcher, 1976,6 ( 5 ) : 3-8.
