Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
259
Natural Environment Research Council: NERC Open Research Archive
51
PANGAEA - Data Publisher for Earth & Environmental Science
41
Zenodo
21
Frontiers: Figshare
19
Directory of Open Access Journals: DOAJ Articles
18
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
17
KovsieScholar Repository (University of the Free State - UFS UV)
17
Unknown
15
Digital.CSIC (Spanish National Research Council)
12
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas)
11
Cambridge University Press
7
OpenMETU (Middle East Technical University)
7
Old Dominion University: ODU Digital Commons
6
University of East Anglia: UEA Digital Repository
6
University of Southampton: e-Prints Soton
6
Copernicus Publications: E-Journals
5
HighWire Press (Stanford University)
5
IEDA: Marine-Geo Digital Library (via DataONE)
5
PubMed Central (PMC)
5
University of California: eScholarship
5
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
4
Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires)
4
Niedersächsisches Online-Archiv NOA
4
IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications
3
ScienceDirect (Elsevier - via Crossref)
3
The Open University: Open Research Online (ORO)
3
University of Tromsø: Munin Open Research Archive
3
Università degli studi di Trieste: ArTS (Archivio della ricerca di Trieste)
3
Université de Nantes: HAL-UNIV-NANTES
3
ArXiv.org (Cornell University Library)
2
BIROn - Birkbeck Institutional Research Online (Birkbeck University of London)
2
Defense Technical Information Center: DTIC Technical Reports database
2
Dryad Digital Repository (Duke University)
2
Frontiers (Publisher)
2
Institute for Marine Research: Brage IMR
2
Instituto Español de Oceanografía: e-IEO
2
Magnolia press
2
National Institute of Polar Research Repository, Japan
2
ScienceDirect (Elsevier)
2
Springer Nature (via Crossref)
2
Universidad Nacional de La Plata (UNLP): SeDiCI (Servicio de Difusión de la Creación Intelectual)
2
University College London: UCL Discovery
2
University of Groningen research database
2
Università degli Studi di Urbino: CINECA IRIS
2
Université de Genève: Archive ouverte UNIGE
2
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
2
eCite UTAS (University of Tasmania)
2
Aarhus University: Research
1
AgroParisTech: HAL (Institut des sciences et industries du vivant et de l'environnement)
1
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