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Heidenreich, F.: Know your search engine : a comparison of 6 popular Web search engines (1997)
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Cree, J.S.; LeBruin, R.: ¬The search for the best engine (1998)
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Courlois, M.P.: Cool tools for Web searching : an update (1996)
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Maurer, H.; Balke, T.; Kappe,, F.; Kulathuramaiyer, N.; Weber, S.; Zaka, B.: Report on dangers and opportunities posed by large search engines, particularly Google (2007)
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Selberg, E.; Etzioni, O.: ¬The MetaCrawler architecture for resource aggregation on the Web (1997)
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