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\newblock Execution performance issues in full-text information retrieval.
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\newblock Scalable feature selection, classification and signature generation
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\newblock Automatic resource compilation by analyzing hyperlink structure and
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\newblock Enhanced hypertext categorization using hyperlinks.
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\newblock Focused crawling: a new approach to topic-specific resource
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\newblock Submitted to the World Wide Web Conference, Jan. 1999.
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S.~Dumais, J.~Platt, D.~Heckerman, and M.~Sahami.
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\newblock Prentice-Hall, 1992.

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\newblock Authoritative sources in a hyperlinked environment.
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\bibitem{SaltonM83}
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\newblock {\em Introduction to Modern Information Retrieval}.
\newblock McGraw-Hill, 1983.

\bibitem{WassermanF93}
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\newblock {\em Social Network Analysis}.
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