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Bell, D.A.; Guan, J.W.: Computational methods for rough classification and discovery (1998)
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Notess, G.R.: Searching the hidden Internet (1997)
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Meng, M.: ¬A conceptual framework for online education programs (1993)
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McMurdo, G.: Indexing the Internet (1994)
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Lindsay, R.K.; Gordon, M.D.: Literature-based discovery by lexical statistics (1999)
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