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Back, J.: ¬An evaluation of relevancy ranking techniques used by Internet search engines (2000)
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Tober, M.; Hennig, L.; Furch, D.: SEO Ranking-Faktoren und Rang-Korrelationen 2014 : Google Deutschland (2014)
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Kanaeva, Z.: Ranking: Google und CiteSeer (2005)
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Furner, J.: ¬A unifying model of document relatedness for hybrid search engines (2003)
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