Content Provider
Unknown
74
DataCite Metadata Store (German National Library of Science and Technology)
73
Wiley Online Library
41
Canadian Science Publishing (via Crossref)
33
Directory of Open Access Journals: DOAJ Articles
30
PubMed Central (PMC)
20
University of British Columbia: cIRcle - UBC's Information Repository
19
Wiley Online Library (via Crossref)
19
University of Alaska: ScholarWorks@UA
18
Canadian Science Publishing
15
HighWire Press (Stanford University)
8
University of Victoria (Canada): UVicDSpace
8
University of Lethbridge Digitized Collections
7
Washington State University: WSU Libraries Digital Collections
7
BioOne Online Journals
6
Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP)
6
International Association of Aquatic and Marine Science Libraries and Information Centers (IAMSLIC): Aquatic Commons
6
Springer Nature (via Crossref)
6
University of Washington, Seattle: ResearchWorks
6
IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications
5
Wageningen UR (University & Research Centre): Digital Library
5
MDPI Open Access Publishing
4
Theses Canada/Thèses Canada (Library and Archives Canada)
4
University of Calgary Journal Hosting
4
Western Washington University: CEDAR (Contributing to Education through Digital Access to Research)
4
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
3
BioMed Central
3
HELDA – University of Helsinki Open Repository
3
Max Planck Society: MPG.PuRe
3
Summit - SFU Research Repository (Simon Fraser University)
3
The University of Queensland: UQ eSpace
3
AgEcon Search - Research in Agricultural & Applied Economics
2
Apollo - University of Cambridge Repository
2
Cambridge University Press
2
Defense Technical Information Center: DTIC Technical Reports database
2
Digital.CSIC (Spanish National Research Council)
2
Hathi Trust Digital Library
2
Hiroshima University: Institutional Repository (HiR)
2
Institut national des sciences de l'Univers: HAL-INSU
2
Lund University Publications (LUP)
2
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
2
ScienceDirect (Elsevier)
2
Technical University of Denmark: DTU Orbit
2
Umeå University: Publications (DiVA)
2
University of California: eScholarship
2
University of Copenhagen: Research
2
University of Cumbria: Insight
2
University of St Andrews: Research Portal
2
VIURRSpace (Royal Roads University and Vancouver Island University)
2
York University, Toronto: YorkSpace
2
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