Content Provider
PANGAEA - Data Publisher for Earth & Environmental Science
3,726
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
135
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
49
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
DIAL@USL-B (Université Saint-Louis, Bruxelles)
26
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
DIAL@UCLouvain (Université catholique de Louvain)
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
HAL Sorbonne Université
19
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
18
NIOZ Repository (Royal Netherlands Institute for Sea Research)
17
Zenodo
17
HighWire Press (Stanford University)
16
more ...