Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
3,164
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
352
Zenodo
254
PANGAEA - Data Publisher for Earth & Environmental Science
245
Natural Environment Research Council: NERC Open Research Archive
170
Directory of Open Access Journals: DOAJ Articles
118
Unknown
112
Springer Nature (via Crossref)
107
Copernicus Publications: E-Journals
60
Cambridge University Press
58
Digital.CSIC (Spanish National Research Council)
56
Niedersächsisches Online-Archiv NOA
44
LeibnizOpen (The Leibniz Association)
40
ScienceDirect (Elsevier - via Crossref)
39
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
38
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
37
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
36
Research Data Australia (Australian National Data Service - ANDS)
35
IEDA: Marine-Geo Digital Library (via DataONE)
34
eCite UTAS (University of Tasmania)
32
National Library of Australia: Digital Collections
30
Magnolia press
29
University of Southampton: e-Prints Soton
26
Université de Nantes: HAL-UNIV-NANTES
25
DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB)
19
University of Groningen research database
17
University of Wisconsin, Milwaukee: UWM Libraries Digital Collections
17
PubMed Central (PMC)
16
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas)
15
ScienceDirect (Elsevier)
15
University of Bergen: Bergen Open Research Archive (BORA-UiB)
15
University of California: eScholarship
15
University of Copenhagen: Research
15
University of Tasmania: UTas ePrints
15
Biodiversity Heritage Library (BHL)
14
IEDA: US Antarctic Program Data Center (via DataONE)
14
Ghent University Academic Bibliography
13
University of East Anglia: UEA Digital Repository
13
Institut national des sciences de l'Univers: HAL-INSU
12
National Institute of Polar Research Repository, Japan
12
Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires)
11
Imperial College London: Spiral
11
Digital Commons University of South Florida (USF)
10
Durham University: Durham Research Online
10
Instituto Español de Oceanografía: e-IEO
10
MDPI Open Access Publishing
10
Texas A&M University Digital Repository
10
The Czech Academy of Sciences: Publication Activity (ASEP)
10
University College London: UCL Discovery
10
University of Pretoria: UPSpace
10
more ...