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Thelwall, M.; Stuart, D.: Web crawling ethics revisited : cost, privacy, and denial of service (2006)
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Angus, E.; Thelwall, M.; Stuart, D.: General patterns of tag usage among university groups in Flickr (2008)
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Thelwall, M.; Klitkou, A.; Verbeek, A.; Stuart, D.; Vincent, C.: Policy-relevant Webometrics for individual scientific fields (2010)
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