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O'Brien, D.: ¬An introduction to the theory of knowledge (2006)
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Tenopir, C.: Online systems for information access and retrieval (2008)
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Turunen, E.: Mathematics behind fuzzy logic (1999)
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Belew, R.K.: Finding out about : a cognitive perspective on search engine technology and the WWW (2001)
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Smart, G.: Using language analysis to manage information (1993)
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