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Vidmar, D.; Anderson, C.: History of Internet search tools (2002)
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Balas, J.: ¬The importance of mastering search engines (1998)
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Scoville, R.: Find it on the net (1996)
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Wills, R.S.: Google's PageRank : the math behind the search engine (2006)
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Vidmar, D.J.; Anderson-Cahoon, C.J.: Internet search tools : history to 2000 (2009)
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