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Dumais, S.T.: Latent semantic analysis (2003)
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Khoo, C.; Myaeng, S.H.: Identifying semantic relations in text for information retrieval and information extraction (2002)
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Na, S.-H.; Kang, I.-S.; Roh, J.-E.; Lee, J.-H.: ¬An empirical study of query expansion and cluster-based retrieval in language modeling approach (2007)
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