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Chen, H.; Fan, H.; Chau, M.; Zeng, D.: MetaSpider : meta-searching and categorization on the Web (2001)
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Feldman, S.: Search Engine Watch : an outstanding and useful meta site (1997)
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Rowland, M.J.: <Meta> tags (2000)
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Hoeber, O.; Yang, X.D.: HotMap : supporting visual exploration of Web search results (2009)
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Conhaim, W.W.: Search tools (1996)
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