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Herre, H.: Formal ontology and the foundation of knowledge organization (2013)
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Gopinath, M.A.: Design of concept codes in information retrieval : an analysis of trends (1987)
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Park, J.-r.: Evolution of concept networks and implications for knowledge representation (2007)
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Helbig, H.: Knowledge representation and the semantics of natural language (2014)
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McCray, A.T.; Nelson, S.J.: ¬The representation of meaning in the UMLS (1995)
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