Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
2,331
Natural Environment Research Council: NERC Open Research Archive
993
Directory of Open Access Journals: DOAJ Articles
579
Unknown
484
IEDA: Marine-Geo Digital Library (via DataONE)
362
PANGAEA - Data Publisher for Earth & Environmental Science
313
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
305
Cambridge University Press
251
Digital.CSIC (Spanish National Research Council)
222
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas)
175
Springer Nature (via Crossref)
163
PubMed Central (PMC)
161
Copernicus Publications: E-Journals
159
ScienceDirect (Elsevier - via Crossref)
138
Zenodo
138
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
123
Frontiers: Figshare
113
Niedersächsisches Online-Archiv NOA
107
MDPI Open Access Publishing
89
University of California: eScholarship
84
eCite UTAS (University of Tasmania)
81
Wiley Online Library (via Crossref)
77
Université de Nantes: HAL-UNIV-NANTES
73
Arctic Data Center (via DataONE)
69
University of Southampton: e-Prints Soton
69
Vernadsky National Library of Ukraine: DSpace
69
Wiley Online Library
67
Utrecht University Repository
65
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
64
Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires)
58
National Institute of Polar Research Repository, Japan
54
HighWire Press (Stanford University)
53
Research Data Australia (Australian National Data Service - ANDS)
53
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
52
Australian National University: ANU Digital Collections
48
University of Tasmania: UTas ePrints
48
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam)
47
ScienceDirect (Elsevier)
44
Institut national des sciences de l'Univers: HAL-INSU
41
LeibnizOpen (The Leibniz Association)
39
University of East Anglia: UEA Digital Repository
39
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
39
Universidad de Chile: Repositorio académico
36
Apollo - University of Cambridge Repository
35
Frontiers (Publisher)
35
White Rose Research Online (Universities of Leeds, Sheffield & York)
35
Universidade Federal do Rio Grande do Sul (UFRGS): Lume
34
Universidad Nacional de La Plata (UNLP): SeDiCI (Servicio de Difusión de la Creación Intelectual)
33
University of Freiburg: FreiDok
33
IEDA: US Antarctic Program Data Center (via DataONE)
32
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