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Otto, M.: Suchstrategien im Internet : Search engines, Themenkataloge, Besprechungsdienste (1997)
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Potempa, T.; Franke, P.; Osowski, W.; Schmidt, M.-E.: Informationen finden im Internet : Leitfaden für die gezielte Online-Recherche (1998)
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Berry, M.W.; Browne, M.: Understanding search engines : mathematical modeling and text retrieval (1999)
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