Content Provider
Directory of Open Access Journals: DOAJ Articles
303
DataCite Metadata Store (German National Library of Science and Technology)
216
Unknown
167
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
149
Copernicus Publications: E-Journals
111
University of Tromsø: Munin Open Research Archive
88
Université de Nantes: HAL-UNIV-NANTES
84
Institut national des sciences de l'Univers: HAL-INSU
80
PubMed Central (PMC)
77
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
72
Niedersächsisches Online-Archiv NOA
66
LeibnizOpen (The Leibniz Association)
58
Aarhus University: Research
56
Springer Nature (via Crossref)
49
PANGAEA - Data Publisher for Earth & Environmental Science
48
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
43
MDPI Open Access Publishing
43
University of Southampton: e-Prints Soton
37
Institute for Marine Research: Brage IMR
35
Natural Environment Research Council: NERC Open Research Archive
35
DataCite
31
Wiley Online Library
31
Digital.CSIC (Spanish National Research Council)
30
HighWire Press (Stanford University)
29
NIOZ Repository (Royal Netherlands Institute for Sea Research)
29
ScienceDirect (Elsevier - via Crossref)
25
University of Bergen: Bergen Open Research Archive (BORA-UiB)
25
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
23
University of Calgary Journal Hosting
21
University of Groningen research database
21
Université de Bretagne Occidentale: HAL
21
Max Planck Society: MPG.PuRe
20
Defense Technical Information Center: DTIC Technical Reports database
18
Plymouth Marine Science Electronic Archive (PlyMSEA - Plymouth Marine Laboratory, PML)
18
HAL Sorbonne Université
16
Norwegian Institute for Water research: NIVA Open Access Archive (Brage)
16
Pohang University of Science and Technology (POSTECH): Open Access System for Information Sharing (OASIS)
16
University of Tasmania: UTas ePrints
16
eCite UTAS (University of Tasmania)
16
Ghent University Academic Bibliography
15
PEARL (Plymouth Electronic Archiv & ResearchLibrary, Plymouth University)
15
University of Alaska: ScholarWorks@UA
15
University of the Highlands and Islands: Research Database of UHI
15
Université Laval: CorpusUL
15
University of Copenhagen: Research
14
HELDA – University of Helsinki Open Repository
13
Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen)
13
ScienceDirect (Elsevier)
13
Technical University of Denmark: DTU Orbit
13
Canadian Science Publishing (via Crossref)
12
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