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ISI launches Discovery Agent (1998)
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Griswold, S.D.: Unleashing agents : the first wave of agent-enabled products hit the market (1996)
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Blank, I.; Rokach, L.; Shani, G.: Leveraging metadata to recommend keywords for academic papers (2016)
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Wilkinson, D.; Thelwall, M.: Trending Twitter topics in English : an international comparison (2012)
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Liu, X.: Generating metadata for cyberlearning resources through information retrieval and meta-search (2013)
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