| 期刊論文| 1. | Powell, Andy(1998)。Resolving DOI Based Urns Using Squid。D-Lib Magazine。   | 其他| 1. | Hakala, Juha，Hoch, Truagott。URN User Guide。 | | 2. | Sun, Sam X.，Lannom, Laurance。Hadel System Overview。 | | 3. | Erickson, John S.(1999)。The Role of Metadata Supply Chanins in DOI-Based, Value-added Services。 | | 4. | DOI Handbook。 | | 5. | Lynch, Clifford。Identifier and Their Role in Networked Information Applications。 | | 6. | Davidson, Lloyd A.，Douglas, Kimberly。Promise and Problems for Scholarly Publishing。 | |