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He, X.; Cai, D.; Liu, H.; Ma, W.Y.: Locality preserving indexing for document representation (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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Wang, Y.; Tai, Y.; Yang, Y.: Determination of semantic types of tags in social tagging systems (2018)
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Lindberg, D.A.B.; Humphreys, B.L.: ¬The UMLS project : making the conceptual connection between users and the information they need (1993)
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Nelson, S.J.; Powell, T.; Srinivasan, S.; Humphreys, B.L.: Unified Medical Language System® (UMLS®) Project (2009)
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