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
482
IEDA: Marine-Geo Digital Library (via DataONE)
362
PANGAEA - Data Publisher for Earth & Environmental Science
317
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
305
Cambridge University Press
285
Digital.CSIC (Spanish National Research Council)
223
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas)
177
Springer Nature (via Crossref)
163
PubMed Central (PMC)
161
Copernicus Publications: E-Journals
159
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
ScienceDirect (Elsevier - via Crossref)
102
Wiley Online Library
97
MDPI Open Access Publishing
89
University of California: eScholarship
84
eCite UTAS (University of Tasmania)
81
ScienceDirect (Elsevier)
80
Wiley Online Library (via Crossref)
75
Université de Nantes: HAL-UNIV-NANTES
73
University of Southampton: e-Prints Soton
70
Arctic Data Center (via DataONE)
69
Vernadsky National Library of Ukraine: DSpace
69
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
Frontiers (Publisher)
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
HAL Sorbonne Université
37
Universidad Nacional de La Plata (UNLP): SeDiCI (Servicio de Difusión de la Creación Intelectual)
36
Universidad de Chile: Repositorio académico
36
White Rose Research Online (Universities of Leeds, Sheffield & York)
36
Apollo - University of Cambridge Repository
35
Universidade Federal do Rio Grande do Sul (UFRGS): Lume
34
University of Freiburg: FreiDok
33
more ...