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Gabel, G.: DOI: die ISBN des 21. Jahrhunderts? (1998)
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Kemp, A. de: ¬Eine Art 'ISBN' für Dokumente im Internet : Das digitale Objekt-Identifizierungssystem (DOI) (1998)
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Ecker, R.: DOI-Workshop in Luxemburg (1998)
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Kemp, A. de: DOI (Digital Object Identifier) ermöglicht Online-Veröffentlichungen vor Drucklegung (1998)
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Hengel-Dittrich, C.: Persistent Identifier für digitale Ressourcen (2000)
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