Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
5,186
Arctic Data Center (via DataONE)
298
Unknown
273
LeibnizOpen (The Leibniz Association)
199
Directory of Open Access Journals: DOAJ Articles
193
Copernicus Publications: E-Journals
162
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
139
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
136
Niedersächsisches Online-Archiv NOA
110
Université de Nantes: HAL-UNIV-NANTES
103
PANGAEA - Data Publisher for Earth & Environmental Science
96
Natural Environment Research Council: NERC Open Research Archive
95
Zenodo
83
University of California: eScholarship
74
Université Grenoble Alpes: HAL
69
Cambridge University Press
65
NASA Technical Reports Server (NTRS)
65
BORIS (Bern Open Repository and Information System, University of Bern)
59
Utrecht University Repository
59
Defense Technical Information Center: DTIC Technical Reports database
52
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
39
University of Copenhagen: Research
38
PubMed Central (PMC)
36
University of Southampton: e-Prints Soton
33
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam)
32
Max Planck Society: MPG.PuRe
32
eCite UTAS (University of Tasmania)
31
Australian National University: ANU Digital Collections
30
EPFL Infoscience (Ecole Polytechnique Fédérale Lausanne)
30
University of Bristol: Bristol Research
29
SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy)
28
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
27
HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives)
27
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
27
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ
27
NOAA NCEI Environmental Data Archive (via DataONE)
26
DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB)
25
Springer Nature (via Crossref)
25
White Rose Research Online (Universities of Leeds, Sheffield & York)
24
Technical University of Denmark: DTU Orbit
22
DIAL@USL-B (Université Saint-Louis, Bruxelles)
21
Lund University Publications (LUP)
21
Archives ouvertes de Paris-Saclay
20
DIAL@UCLouvain (Université catholique de Louvain)
20
Digital.CSIC (Spanish National Research Council)
19
IEDA: US Antarctic Program Data Center (via DataONE)
19
Institut national des sciences de l'Univers: HAL-INSU
19
MDPI Open Access Publishing
19
University College London: UCL Discovery
19
Ohio State University (OSU): Knowledge Bank
18
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