Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
508
Unknown
348
PANGAEA - Data Publisher for Earth & Environmental Science
339
Directory of Open Access Journals: DOAJ Articles
285
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
158
Natural Environment Research Council: NERC Open Research Archive
119
eCite UTAS (University of Tasmania)
116
Université de Nantes: HAL-UNIV-NANTES
115
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
107
PubMed Central (PMC)
104
Copernicus Publications: E-Journals
94
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
94
University of Southampton: e-Prints Soton
72
Institut national des sciences de l'Univers: HAL-INSU
70
Cambridge University Press
67
Digital.CSIC (Spanish National Research Council)
66
Niedersächsisches Online-Archiv NOA
60
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas)
57
Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR
55
ScienceDirect (Elsevier - via Crossref)
55
University of Tasmania: UTas ePrints
55
Wiley Online Library (via Crossref)
50
GFZ Data Services (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam)
47
Springer Nature (via Crossref)
45
Defense Technical Information Center: DTIC Technical Reports database
44
National Institute of Polar Research Repository, Japan
43
The University of Queensland: UQ eSpace
43
MDPI Open Access Publishing
41
LeibnizOpen (The Leibniz Association)
38
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research)
38
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
34
HighWire Press (Stanford University)
34
Magnolia press
34
WikiBooks - Open-content textbooks
33
Wiley Online Library
31
Max Planck Society: MPG.PuRe
30
University of California: eScholarship
30
Utrecht University Repository
30
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
29
Apollo - University of Cambridge Repository
27
Università degli Studi di Napoli "Parthenope": CINECA IRIS
26
University of Groningen research database
25
Caltech Authors (California Institute of Technology)
23
Columbia University: Academic Commons
23
Université de Bretagne Occidentale: HAL
23
Washington State University: WSU Libraries Digital Collections
23
ScholarsArchive@OSU (Oregon State University)
22
Australian National University: ANU Digital Collections
21
BORIS (Bern Open Repository and Information System, University of Bern)
20
University of St Andrews: Research Portal
20
more ...