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Li, T.; Zhu, S.; Ogihara, M.: Hierarchical document classification using automatically generated hierarchy (2007)
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Buckley, C.; Allan, J.; Salton, G.: Automatic routing and retrieval using Smart : TREC-2 (1995)
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Robertson, S.E.; Walker, S.; Hancock-Beaulieu, M.M.: Large test collection experiments of an operational, interactive system : OKAPI at TREC (1995)
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TREC: experiment and evaluation in information retrieval (2005)
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Costers, L.; Dekkers, M.: PICA's integrated infrastructure for document ordering and online document access (1996)
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