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Kaizik, A.; Gödert, W.; Milanesi, C.: Erfahrungen und Ergebnisse aus der Evaluierung des EU-Projektes EULER im Rahmen des an der FH Köln angesiedelten Projektes EJECT (Evaluation von Subject Gateways des World Wide Web (2001)
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Kaizik, A.; Gödert, W.; Oßwald, A.: Evaluation von Subject Gateways des Internet (EJECT) : Projektbericht (2001)
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Jansen, H.; Wirtz, H.-C.: "Users want unified access" : Die Digitale Öffentliche Bibliothek (2002)
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Conrad, S.: Föderierte Datenbanksysteme : Konzepte der Datenintegration (1997)
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Scheufen, J.-H.: RECOIN: Modell offener Schnittstellen für Information-Retrieval-Systeme und -Komponenten (2006)
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