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Mitchell, J.S.: Options in the Dewey Decimal Classification system : the current perspective (1995)
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Koh, G.S.: Options in classification available through modern technology (1995)
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Zeng, M.L.; Panzer, M.; Salaba, A.: Expressing classification schemes with OWL 2 Web Ontology Language : exploring issues and opportunities based on experiments using OWL 2 for three classification schemes
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Downie, J.S.: ¬The MusiFind Music Information Retrieval project, phase III : evaluation of indexing options (1995)
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Peereboom, M.: DutchESS : Dutch Electronic Subject Service - a Dutch national collaborative effort (2000)
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