Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
1,490
PANGAEA - Data Publisher for Earth & Environmental Science
1,201
Directory of Open Access Journals: DOAJ Articles
814
Unknown
619
Natural Environment Research Council: NERC Open Research Archive
515
ScienceDirect (Elsevier - via Crossref)
388
Cambridge University Press
372
Springer Nature (via Crossref)
280
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas)
277
PubMed Central (PMC)
261
Copernicus Publications: E-Journals
207
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
183
Open Parks Network
178
Niedersächsisches Online-Archiv NOA
142
Digital.CSIC (Spanish National Research Council)
140
ScienceDirect (Elsevier)
128
MDPI Open Access Publishing
117
Université de Nantes: HAL-UNIV-NANTES
114
eCite UTAS (University of Tasmania)
107
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
101
Wiley Online Library (via Crossref)
98
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
89
Wiley Online Library
85
University of Southampton: e-Prints Soton
82
LeibnizOpen (The Leibniz Association)
79
Utrecht University Repository
77
National Institute of Polar Research Repository, Japan
71
University of Alberta: Era - Education and Research Archive
68
Institut national des sciences de l'Univers: HAL-INSU
66
HighWire Press (Stanford University)
65
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
56
Ghent University Academic Bibliography
54
Universidad Nacional de La Plata (UNLP): SeDiCI (Servicio de Difusión de la Creación Intelectual)
51
University of Freiburg: FreiDok
49
University of Groningen research database
49
University of Tasmania: UTas ePrints
48
Zenodo
47
Apollo - University of Cambridge Repository
46
Universidad de Chile: Repositorio académico
46
University of California: eScholarship
45
White Rose Research Online (Universities of Leeds, Sheffield & York)
44
The Royal Society (via Crossref)
35
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam)
34
University of Bristol: Bristol Research
33
University of East Anglia: UEA Digital Repository
33
Magnolia press
32
HAL Sorbonne Université
31
NIOZ Repository (Royal Netherlands Institute for Sea Research)
30
Arctic Portal Library
27
Informa (via Crossref)
27
more ...