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Croft, W.B.; Metzler, D.; Strohman, T.: Search engines : information retrieval in practice (2010)
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Social information retrieval systems : emerging technologies and applications for searching the Web effectively (2008)
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Colomb, R.M.: Information spaces : the architecture of cyberspace (2002)
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Manning, C.D.; Raghavan, P.; Schütze, H.: Introduction to information retrieval (2008)
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