Content Provider
Unknown
181
ScienceDirect (Elsevier - via Crossref)
134
Directory of Open Access Journals: DOAJ Articles
115
Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP)
95
Springer Nature (via Crossref)
93
ScienceDirect (Elsevier)
63
DataCite Metadata Store (German National Library of Science and Technology)
61
PubMed Central (PMC)
57
IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications
53
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
46
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
43
Wiley Online Library
43
Copernicus Publications: E-Journals
41
HighWire Press (Stanford University)
41
PANGAEA - Data Publisher for Earth & Environmental Science
37
The Hong Kong University of Science and Technology: HKUST Institutional Repository
37
International Association of Aquatic and Marine Science Libraries and Information Centers (IAMSLIC): Aquatic Commons
35
Niedersächsisches Online-Archiv NOA
33
University of British Columbia: cIRcle - UBC's Information Repository
33
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
31
Defense Technical Information Center: DTIC Technical Reports database
28
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
27
eCite UTAS (University of Tasmania)
19
Canadian Science Publishing (via Crossref)
17
University of Victoria (Canada): UVicDSpace
16
Natural Environment Research Council: NERC Open Research Archive
14
Institut national des sciences de l'Univers: HAL-INSU
13
MDPI Open Access Publishing
12
Theses Canada/Thèses Canada (Library and Archives Canada)
12
BORIS (Bern Open Repository and Information System, University of Bern)
11
Cambridge University Press
10
University of Potsdam: publish.UP
10
Université de Nantes: HAL-UNIV-NANTES
10
Wiley Online Library (via Crossref)
10
National Institute of Polar Research Repository, Japan
9
National Institute of Radiological Science: NIRS-Repository
9
University of California: eScholarship
9
Magnolia press
8
Max Planck Society: MPG.PuRe
8
Kyoto University Research Information Repository (KURENAI)
7
Oxford University Press (via Crossref)
7
University of Alaska: ScholarWorks@UA
7
University of Calgary Journal Hosting
7
University of Southampton: e-Prints Soton
7
Columbia University: Academic Commons
6
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
6
Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen)
6
Oxford University Press
6
University of North Texas: UNT Digital Library
6
University of Portsmouth: Portsmouth Research Portal
6
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