Content Provider
LeibnizOpen (The Leibniz Association)
40
Directory of Open Access Journals: DOAJ Articles
35
Unknown
26
DataCite Metadata Store (German National Library of Science and Technology)
23
Natural Environment Research Council: NERC Open Research Archive
21
PANGAEA - Data Publisher for Earth & Environmental Science
21
Copernicus Publications: E-Journals
14
eCite UTAS (University of Tasmania)
11
Niedersächsisches Online-Archiv NOA
9
University of Southampton: e-Prints Soton
9
Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR
8
PubMed Central (PMC)
8
University of Groningen research database
8
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
7
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
7
NIOZ Repository (Royal Netherlands Institute for Sea Research)
6
Université de Nantes: HAL-UNIV-NANTES
6
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
5
ScienceDirect (Elsevier - via Crossref)
5
Apollo - University of Cambridge Repository
4
Cambridge University Press
4
University of Tasmania: UTas ePrints
4
Keele University: Keele Research Repository
3
MDPI Open Access Publishing
3
Magnolia press
3
Northumbria University, Newcastle: Northumbria Research Link (NRL)
3
University of California: eScholarship
3
University of East Anglia: UEA Digital Repository
3
University of St Andrews: Research Portal
3
Wiley Online Library (via Crossref)
3
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
2
Arctic Portal Library
2
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
2
HAL Sorbonne Université
2
Max Planck Society: MPG.PuRe
2
Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen)
2
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research)
2
Renate - Repositorium für Naturwissenschaften und Technik (TIB Hannover)
2
Springer Nature (via Crossref)
2
The University of Queensland: UQ eSpace
2
University College London: UCL Discovery
2
University of California Press
2
University of Georgia: Athenaeum@UGA
2
University of St Andrews: Digital Research Repository
2
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas)
1
DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB)
1
DIAL@UCLouvain (Université catholique de Louvain)
1
DIAL@USL-B (Université Saint-Louis, Bruxelles)
1
Dalhousie University: DalSpace Institutional Repository
1
Defense Technical Information Center: DTIC Technical Reports database
1
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