Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
1,695
PANGAEA - Data Publisher for Earth & Environmental Science
1,477
Directory of Open Access Journals: DOAJ Articles
846
Unknown
725
eCite UTAS (University of Tasmania)
635
Copernicus Publications: E-Journals
408
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
334
Natural Environment Research Council: NERC Open Research Archive
319
Niedersächsisches Online-Archiv NOA
268
University of Tasmania: UTas ePrints
248
Université de Nantes: HAL-UNIV-NANTES
246
PubMed Central (PMC)
203
LeibnizOpen (The Leibniz Association)
196
Springer Nature (via Crossref)
156
Defense Technical Information Center: DTIC Technical Reports database
150
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
135
ScienceDirect (Elsevier - via Crossref)
119
Cambridge University Press
118
National Institute of Polar Research Repository, Japan
115
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
115
MDPI Open Access Publishing
106
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
92
Institut national des sciences de l'Univers: HAL-INSU
89
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research)
85
University of Southampton: e-Prints Soton
82
DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB)
75
Wiley Online Library (via Crossref)
73
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
65
Zenodo
65
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam)
58
Max Planck Society: MPG.PuRe
55
Wiley Online Library
53
Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP)
48
University of East Anglia: UEA Digital Repository
48
Digital.CSIC (Spanish National Research Council)
45
University of Groningen research database
45
University of California: eScholarship
44
ScienceDirect (Elsevier)
39
University of Canterbury, Christchurch: UC Research Repository
39
Utrecht University Repository
34
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas)
31
Informa (via Crossref)
31
University of St Andrews: Research Portal
31
DSpace@MIT (Massachusetts Institute of Technology)
30
University College London: UCL Discovery
29
Arctic Portal Library
27
EPHE (Ecole pratique des hautes études, Paris): HAL
27
Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen)
27
University of Tromsø: Munin Open Research Archive
27
CentAUR: Central Archive at the University of Reading
26
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