Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
380
Directory of Open Access Journals: DOAJ Articles
88
Unknown
88
Skemman (Iceland)
74
Wiley Online Library
67
Opin vísindi (Iceland)
50
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
47
Cambridge University Press
41
Natural Environment Research Council: NERC Open Research Archive
36
Copernicus Publications: E-Journals
32
Université de Nantes: HAL-UNIV-NANTES
32
Institut national des sciences de l'Univers: HAL-INSU
29
ScienceDirect (Elsevier - via Crossref)
27
Durham University: Durham Research Online
25
Lund University Publications (LUP)
24
University of Southampton: e-Prints Soton
24
Niedersächsisches Online-Archiv NOA
23
University of Copenhagen: Research
22
Wiley Online Library (via Crossref)
20
German Aerospace Center: elib - DLR electronic library
18
Lancaster University: Lancaster Eprints
17
Zenodo
17
Discovery - University of Dundee Online Publications
16
Five Colleges of Ohio Digital Collections
16
Springer Nature (via Crossref)
16
Staffordshire University: STORE - Staffordshire Online Repository
16
RePEc (Research Papers in Economics)
15
The Open University: Open Research Online (ORO)
14
White Rose Research Online (Universities of Leeds, Sheffield & York)
14
Loughborough University: Figshare
13
Utrecht University Repository
13
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam)
12
Informa
12
MDPI Open Access Publishing
12
Météo-France: HAL
11
NASA Technical Reports Server (NTRS)
11
Université Toulouse III - Paul Sabatier: HAL-UPS
11
Arctic Data Center (via DataONE)
10
HAL Clermont Auvergne (Université Blaise Pascal Clermont-Ferrand/Université d'Auvergne)
10
PANGAEA - Data Publisher for Earth & Environmental Science
10
Apollo - University of Cambridge Repository
9
University of St Andrews: Research Portal
9
Edinburgh Research Archive (ERA - University of Edinburgh)
8
Frontiers: Figshare
8
SAGE Publications
8
ScienceDirect (Elsevier)
8
Universitet i Oslo: Digitale utgivelser ved UiO (DUO)
8
Université de Limoges: HAL
8
Digital Commons University of South Florida (USF)
7
Digital Repository @ Iowa State University
7
more ...