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Fugmann, R.; Nickelsen, H.; Nickelsen, I.; Winter, J.H.: Representation of concept relations using the TOSAR system of IDC : treatise 3 on information retrieval theory (1974)
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- Journal of the American Society for Information Science. 25(1974), S.287-307
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Fugmann, R.; Winter, J.H.: Reverse retrieval : toward analogy inferences by mechanized classification (treatise 7 on retrieval system theory) (1979)
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Fugmann, R.; Isenberg, M.; Winter, J.H.: ¬Das Suchen nach verallgemeinerter Information : treatise 9 on retrieval system theory (1985)
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