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Chowdhury, G.G.; Mahapatra, M.: Applications of the theory of relational analysis in information retrieval (1990)
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Davies, R.: ¬The creation of new knowledge by information retrieval and classification (1989)
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Moss, R.: Categories and relations : Origins of two classification theories (1964)
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Cassi, L.: Relational tools to manage pictorial information (1992)
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Nubila, B. di; Gagliardi, I.; Macchi, D.; Milanesi, L.; Padula, M.; Pagani, R.: Concept-based indexing and retrieval of multimedia documents (1994)
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