Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
5,450
PANGAEA - Data Publisher for Earth & Environmental Science
817
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
677
Zenodo
625
Natural Environment Research Council: NERC Open Research Archive
329
Directory of Open Access Journals: DOAJ Articles
244
Unknown
240
Springer Nature (via Crossref)
141
Copernicus Publications: E-Journals
134
Cambridge University Press
119
Digital.CSIC (Spanish National Research Council)
115
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
102
Niedersächsisches Online-Archiv NOA
92
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
89
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
75
ScienceDirect (Elsevier - via Crossref)
67
eCite UTAS (University of Tasmania)
64
LeibnizOpen (The Leibniz Association)
60
University of Southampton: e-Prints Soton
59
Université de Nantes: HAL-UNIV-NANTES
51
University of East Anglia: UEA Digital Repository
44
Research Data Australia (Australian National Data Service - ANDS)
43
PubMed Central (PMC)
40
University of Groningen research database
39
Magnolia press
36
DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB)
35
IEDA: Marine-Geo Digital Library (via DataONE)
34
Institut national des sciences de l'Univers: HAL-INSU
32
Wiley Online Library (via Crossref)
32
National Library of Australia: Digital Collections
31
National Institute of Polar Research Repository, Japan
27
University of Tasmania: UTas ePrints
26
Ghent University Academic Bibliography
25
NASA Technical Reports Server (NTRS)
25
ScienceDirect (Elsevier)
25
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas)
24
University of Bergen: Bergen Open Research Archive (BORA-UiB)
24
MDPI Open Access Publishing
23
University of California: eScholarship
22
Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen)
21
Max Planck Society: MPG.PuRe
20
University of St Andrews: Research Portal
20
Frontiers: Figshare
19
Wageningen UR (University & Research Centre): Digital Library
19
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
18
Defense Technical Information Center: DTIC Technical Reports database
18
University of Wisconsin, Milwaukee: UWM Libraries Digital Collections
18
Instituto Español de Oceanografía: e-IEO
17
Biodiversity Heritage Library (BHL)
16
IEDA: US Antarctic Program Data Center (via DataONE)
16
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