Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
1,490
PANGAEA - Data Publisher for Earth & Environmental Science
1,184
Directory of Open Access Journals: DOAJ Articles
814
Unknown
618
Natural Environment Research Council: NERC Open Research Archive
515
ScienceDirect (Elsevier - via Crossref)
388
Cambridge University Press
360
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
113
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
Universidad de Chile: Repositorio académico
46
Apollo - University of Cambridge Repository
45
University of California: eScholarship
45
White Rose Research Online (Universities of Leeds, Sheffield & York)
44
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
The Royal Society (via Crossref)
31
NIOZ Repository (Royal Netherlands Institute for Sea Research)
30
Arctic Portal Library
27
Informa (via Crossref)
27
Universidade de Lisboa: repositório.UL
27
more ...