Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
196
LeibnizOpen (The Leibniz Association)
145
Directory of Open Access Journals: DOAJ Articles
132
Natural Environment Research Council: NERC Open Research Archive
132
Unknown
132
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
131
Copernicus Publications: E-Journals
118
University of California: eScholarship
77
Niedersächsisches Online-Archiv NOA
76
IEDA: US Antarctic Program Data Center (via DataONE)
66
Cambridge University Press
49
PANGAEA - Data Publisher for Earth & Environmental Science
39
Utrecht University Repository
33
Imperial College London: Spiral
32
University of Bristol: Bristol Research
29
Institut national des sciences de l'Univers: HAL-INSU
27
Northumbria University, Newcastle: Northumbria Research Link (NRL)
27
PubMed Central (PMC)
27
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
26
SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy)
24
Zenodo
23
eCite UTAS (University of Tasmania)
23
The University of Maine: DigitalCommons@UMaine
21
University College London: UCL Discovery
21
Durham University: Durham Research Online
20
Université de Nantes: HAL-UNIV-NANTES
19
Digital Commons University of South Florida (USF)
17
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam)
17
NASA Technical Reports Server (NTRS)
17
University of South Florida St. Petersburg: Digital USFSP
17
White Rose Research Online (Universities of Leeds, Sheffield & York)
16
AAAS Resource Center (American Association for the Advancement of Science)
15
Apollo - University of Cambridge Repository
15
Delft University of Technology: Institutional Repository
15
HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives)
13
Lancaster University: Lancaster Eprints
13
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ
13
Caltech Authors (California Institute of Technology)
12
Central Washington University: ScholarWorks
11
Columbia University: Academic Commons
11
DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB)
11
Technical University of Denmark: DTU Orbit
11
University of Southampton: e-Prints Soton
11
Université Grenoble Alpes: HAL
11
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research)
10
University of Tasmania: UTas ePrints
10
Archives ouvertes de Paris-Saclay
9
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
9
MDPI Open Access Publishing
9
Newcastle University Library ePrints Service
9
more ...