Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
4,339
PANGAEA - Data Publisher for Earth & Environmental Science
327
Natural Environment Research Council: NERC Open Research Archive
278
Directory of Open Access Journals: DOAJ Articles
217
Unknown
187
Copernicus Publications: E-Journals
113
Digital.CSIC (Spanish National Research Council)
108
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
82
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
79
Niedersächsisches Online-Archiv NOA
77
Cambridge University Press
73
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
66
LeibnizOpen (The Leibniz Association)
60
eCite UTAS (University of Tasmania)
57
University of Southampton: e-Prints Soton
51
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
46
Springer Nature (via Crossref)
46
Université de Nantes: HAL-UNIV-NANTES
45
University of East Anglia: UEA Digital Repository
42
PubMed Central (PMC)
36
Research Data Australia (Australian National Data Service - ANDS)
31
DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB)
28
Institut national des sciences de l'Univers: HAL-INSU
26
University of Tasmania: UTas ePrints
26
University of St Andrews: Research Portal
25
MDPI Open Access Publishing
23
Magnolia press
23
National Institute of Polar Research Repository, Japan
23
University of Groningen research database
23
ScienceDirect (Elsevier - via Crossref)
21
Wiley Online Library
21
NASA Technical Reports Server (NTRS)
20
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas)
19
DIAL@USL-B (Université Saint-Louis, Bruxelles)
19
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
18
Defense Technical Information Center: DTIC Technical Reports database
18
Ghent University Academic Bibliography
18
Wageningen UR (University & Research Centre): Digital Library
18
Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen)
17
Frontiers: Figshare
16
IEDA: US Antarctic Program Data Center (via DataONE)
16
Instituto Español de Oceanografía: e-IEO
16
University of Bergen: Bergen Open Research Archive (BORA-UiB)
16
Caltech Authors (California Institute of Technology)
14
Durham University: Durham Research Online
14
Max Planck Society: MPG.PuRe
14
Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires)
13
HighWire Press (Stanford University)
13
NOAA NCEI Environmental Data Archive (via DataONE)
13
Northumbria University, Newcastle: Northumbria Research Link (NRL)
13
more ...