Content Provider
PANGAEA - Data Publisher for Earth & Environmental Science
3,722
DataCite Metadata Store (German National Library of Science and Technology)
756
Directory of Open Access Journals: DOAJ Articles
289
Unknown
273
Springer Nature (via Crossref)
191
Copernicus Publications: E-Journals
159
Natural Environment Research Council: NERC Open Research Archive
154
ScienceDirect (Elsevier - via Crossref)
154
Cambridge University Press
131
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
128
Niedersächsisches Online-Archiv NOA
112
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
106
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
99
ScienceDirect (Elsevier)
91
eCite UTAS (University of Tasmania)
78
Digital.CSIC (Spanish National Research Council)
77
LeibnizOpen (The Leibniz Association)
60
Université de Nantes: HAL-UNIV-NANTES
58
Magnolia press
55
PubMed Central (PMC)
49
University of Groningen research database
49
University of Southampton: e-Prints Soton
48
Wiley Online Library (via Crossref)
44
Institut national des sciences de l'Univers: HAL-INSU
42
DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB)
39
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas)
33
Ghent University Academic Bibliography
33
National Institute of Polar Research Repository, Japan
31
University of Bergen: Bergen Open Research Archive (BORA-UiB)
31
University of East Anglia: UEA Digital Repository
30
Max Planck Society: MPG.PuRe
29
University of Tasmania: UTas ePrints
29
MDPI Open Access Publishing
27
Defense Technical Information Center: DTIC Technical Reports database
24
University of St Andrews: Research Portal
24
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
22
Informa (via Crossref)
20
Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen)
20
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research)
20
University of Copenhagen: Research
20
OpenAgrar (OA)
19
University of the Highlands and Islands: Research Database of UHI
19
Wageningen UR (University & Research Centre): Digital Library
19
Apollo - University of Cambridge Repository
17
NIOZ Repository (Royal Netherlands Institute for Sea Research)
17
Zenodo
17
HighWire Press (Stanford University)
16
KITopen (Karlsruhe Institute of Technologie)
16
HAL Sorbonne Université
15
Northumbria University, Newcastle: Northumbria Research Link (NRL)
15
more ...