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Tjondronegoro, D.; Spink, A.: Web search engine multimedia functionality (2008)
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Notess, G.R.: On the net : dead search engines (2002)
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Peterson, R.E.: Eight Internet search engines compared (1996)
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MacDougall, S.: Rethinking indexing : the impact of the Internet (1996)
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Mowshowitz, A.; Kawaguchi, A.: Measuring search engine bias (2005)
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