Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
2,379
Unknown
22
Directory of Open Access Journals: DOAJ Articles
20
Natural Environment Research Council: NERC Open Research Archive
19
Copernicus Publications: E-Journals
18
Niedersächsisches Online-Archiv NOA
10
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
9
NASA Technical Reports Server (NTRS)
9
PANGAEA - Data Publisher for Earth & Environmental Science
8
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
7
Research Data Australia (Australian National Data Service - ANDS)
7
Cambridge University Press
6
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
6
NOAA NCEI Environmental Data Archive (via DataONE)
6
Springer Nature (via Crossref)
6
University of Southampton: e-Prints Soton
6
Defense Technical Information Center: DTIC Technical Reports database
5
PubMed Central (PMC)
5
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
4
University of East Anglia: UEA Digital Repository
4
ArXiv.org (Cornell University Library)
3
National Institute of Polar Research Repository, Japan
3
University of Calgary Journal Hosting
3
University of Groningen research database
3
University of the Highlands and Islands: Research Database of UHI
3
eCite UTAS (University of Tasmania)
3
Aarhus University: Research
2
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
2
Arctic and Antarctic Research (E-Journal)
2
DataCite
2
EPFL Infoscience (Ecole Polytechnique Fédérale Lausanne)
2
Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia)
2
Ghent University Academic Bibliography
2
HELDA – University of Helsinki Open Repository
2
Institut national des sciences de l'Univers: HAL-INSU
2
Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR
2
MDPI Open Access Publishing
2
Magnolia press
2
Universidad de Las Palmas de Gran Canaria: Acceda
2
University of Tasmania: UTas ePrints
2
Università Politecnica delle Marche: IRIS
2
Université de Genève: Archive ouverte UNIGE
2
Université de Nantes: HAL-UNIV-NANTES
2
Aalto University Publication Archive (Aaltodoc)
1
Apollo - University of Cambridge Repository
1
Archives ouvertes de Paris-Saclay
1
Arctic Institute of North America
1
Australian National University: ANU Digital Collections
1
CentAUR: Central Archive at the University of Reading
1
Chalmers University of Technology: Chalmers research
1
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