DOI = Digital Object Identifier  i PURL = Persistent Uniform Resource Locator

Knjige:

1. Deegan, Marilyn: Digital futures : strategies for the information age. London : Library Association Publishing, 2002 - sign. 025 /DEE/ d BDI
2. Haynes, David: Metadata : for information management and retrieval. London : Facet Publishing, 2004 - sign. 02 /HAY/ m BDI
3. Živković, Daniela: Elektronička knjiga. Zagreb : Multigraf, 2001 - sign. 02 /ŽIV/ e

Izvori na internetu (03.01.2013.):

1. DOI.org : The DOI System
2. DOI.org : DOI® Handbook
3. DOI.org : Digital Object Identifier
4. Electronic Sources and Locator Information (PDF)
5. Digital Object Identifiers (DOIs)

Pogledajte i odgovor pod brojem:

3348 - Persistent Uniform Resource Locator (PURL)