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http://www.nist.gov/speech/tdt98/tdt98.htm
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ftp://jaguar.ncsl.nist.gov/tdt98/tdt2_dec98_official_results_19990204/index.htm.
3. The topic detection and tracking phase 2 (TDT2) evaluation plan,
http://www.nist.gov/speech/tdt98/doc/tdt2.eval.plan.98.v3.7.pdf
4. Agrawal, R., Imielinski, T., Swami, A.N.: Mining association rules between sets of items in large databases. In: Buneman, P., Jajodia, S. (eds.) Proceedings of the 1993 ACM SIGMOD International Conference on Management of Data, Washington, D.C, May 26–28, pp. 207–216 (1993)
5. Lecture Notes in Computer Science;H. Ahonen,1997