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Lee, C.-H.; Khoo, C.; Na, J.-C.: Automatic identification of treatment relations for medical ontology learning : an exploratory study (2004)
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Na, J.-C.; Sui, H.; Khoo, C.; Chan, S.; Zhou, Y.: Effectiveness of simple linguistic processing in automatic sentiment classification of product reviews (2004)
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Na, J.-C.; Neoh, H.L.: Effectiveness of UMLS semantic network as a seed ontology for building a medical domain ontology (2008)
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Khoo, S.G.; Na, J.-C.: Semantic relations in information science (2006)
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