Content Provider
Unknown
61
DataCite Metadata Store (German National Library of Science and Technology)
22
National Library of Australia: Digital Collections
17
Zenodo
15
The University of Melbourne: Digitised Collections
12
Cambridge University Press
9
Directory of Open Access Journals: DOAJ Articles
8
National Institute of Polar Research Repository, Japan
8
Wiley Online Library (via Crossref)
6
Research Data Australia (Australian National Data Service - ANDS)
5
University of Canterbury, Christchurch: UC Research Repository
5
Dryad Digital Repository (Duke University)
4
University of Michigan: Digital Collections
4
PubMed Central (PMC)
3
ScholarsArchive@OSU (Oregon State University)
3
The University of Waikato: Research Commons
3
ARPI - Archivio della Ricerca dell'Università di Pisa
2
Australian National University: ANU Digital Collections
2
Informa (via Crossref)
2
Magnolia press
2
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
2
Ohio State University (OSU): Knowledge Bank
2
Springer Nature (via Crossref)
2
University of Bristol: Bristol Research
2
University of Wisconsin, Milwaukee: UWM Libraries Digital Collections
2
ASM Journals (American Society for Microbiology - via Crossref)
1
AU Digital Research Archive (American University)
1
Brill (via Crossref)
1
Copernicus Publications: E-Journals
1
EPFL Infoscience (Ecole Polytechnique Fédérale Lausanne)
1
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
1
Ghent University Academic Bibliography
1
HighWire Press (Stanford University)
1
IEDA: US Antarctic Program Data Center (via DataONE)
1
IRUA - Institutional Repository van de Universiteit Antwerpen
1
Macquarie University Research Portal
1
Montana State University (MSU): ScholarWorks
1
NASA Technical Reports Server (NTRS)
1
Natural Environment Research Council: NERC Open Research Archive
1
Niedersächsisches Online-Archiv NOA
1
Portland State University: PDXScholar
1
SDSUnbound (San Diego State University)
1
ScienceDirect (Elsevier - via Crossref)
1
University of Colorado, Boulder: CU Scholar
1
University of Tasmania: UTas ePrints
1
eCite UTAS (University of Tasmania)
1