Content Provider
Directory of Open Access Journals: DOAJ Articles
37
PubMed Central (PMC)
24
Unknown
19
Natural Environment Research Council: NERC Open Research Archive
15
DataCite Metadata Store (German National Library of Science and Technology)
12
Digital.CSIC (Spanish National Research Council)
9
eCite UTAS (University of Tasmania)
9
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
7
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas)
7
HighWire Press (Stanford University)
6
Springer Nature (via Crossref)
5
University of California: eScholarship
5
MDPI Open Access Publishing
4
Plymouth Marine Science Electronic Archive (PlyMSEA - Plymouth Marine Laboratory, PML)
4
Universidad Nacional de La Plata (UNLP): SeDiCI (Servicio de Difusión de la Creación Intelectual)
4
Universidade de Coimbra: Estudo Geral
4
University of Tasmania: UTas ePrints
4
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
4
National Institute of Polar Research Repository, Japan
3
Oxford University Press
3
University of Southampton: e-Prints Soton
3
Université de Nantes: HAL-UNIV-NANTES
3
W&M ScholarWorks
3
Wiley Online Library
3
BioMed Central
2
Cambridge University Press
2
Columbia University: Academic Commons
2
HAL - Université de La Rochelle
2
ORA - Oxford University Research Archive
2
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
2
OpenAgrar (OA)
2
The University of Delaware Library Institutional Repository
2
Theses Canada/Thèses Canada (Library and Archives Canada)
2
Universidad de Las Palmas de Gran Canaria: Acceda
2
University of Rhode Island: DigitalCommons@URI
2
University of St Andrews: Research Portal
2
University of Tromsø: Munin Open Research Archive
2
University of the Highlands and Islands: Research Database of UHI
2
BioOne Online Journals
1
California State University (CSU): DSpace
1
Caltech Authors (California Institute of Technology)
1
Copernicus Publications: E-Journals
1
DSpace@MIT (Massachusetts Institute of Technology)
1
Defense Technical Information Center: DTIC Technical Reports database
1
Dipòsit Digital de la Universitat de Barcelona
1
Duke University Libraries: DukeSpace
1
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
1
Guangzhou Institute of Geochemistry: GIG OpenIR (Chinese Academy of Sciences)
1
HAL Sorbonne Université
1
IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications
1
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