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Kollewe, W.; Skorsky, M.; Vogt, F.; Wille, R.: TOSCANA - ein Werkzeug zur begrifflichen Analyse und Erkundung von Daten (1994)
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- Begriffliche Wissensverarbeitung: Grundfragen und Aufgaben. Hrsg.: R. Wille u. M. Zickwolff
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Vogt, F.; Wachter, C.; Wille, R.: Data analysis based on a conceptual file (1991)
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- Classification, data analysis, and knowledge organization. Ed.: H.H. Bock u. P. Ihm
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Vogt, F.; Wille, R.: TOSCANA - a graphical tool for analyzing and exploring data (1995)
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- Knowledge organization. 22(1995) no.2, S.78-81