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Hengel-Dittrich, C.: Persistent Identifier für digitale Ressourcen (2000)
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Schroeder, K.: Persistant identifiers im Kontext von Metadaten (2003)
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Lautenschlager, M.; Sens, I.: Konzept zur Zitierfähigkeit wissenschaftlicher Primärdaten (2003)
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DOI-Agentur für Deutschland, Schweiz und Österreich (2005)
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