Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
1,960
Unknown
354
Directory of Open Access Journals: DOAJ Articles
330
NOAA NCEI Environmental Data Archive (via DataONE)
244
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
226
Copernicus Publications: E-Journals
216
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
170
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
161
PANGAEA - Data Publisher for Earth & Environmental Science
156
Institut national des sciences de l'Univers: HAL-INSU
142
LeibnizOpen (The Leibniz Association)
132
DataCite
129
Niedersächsisches Online-Archiv NOA
128
Université de Nantes: HAL-UNIV-NANTES
122
Wiley Online Library
94
Zenodo
93
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
88
HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives)
88
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ
87
Defense Technical Information Center: DTIC Technical Reports database
75
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research)
75
Natural Environment Research Council: NERC Open Research Archive
73
HAL Sorbonne Université
71
University of Bergen: Bergen Open Research Archive (BORA-UiB)
70
Max Planck Society: MPG.PuRe
65
Arctic Data Center (via DataONE)
59
École Polytechnique, Université Paris-Saclay: HAL
59
CentAUR: Central Archive at the University of Reading
56
PubMed Central (PMC)
56
Muséum National d'Histoire Naturelle (MNHM): HAL
53
University of California: eScholarship
53
Archives ouvertes de Paris-Saclay
50
Université de Paris: Portail HAL
50
University of Southampton: e-Prints Soton
47
Biodiversity Heritage Library (BHL)
39
Springer Nature (via Crossref)
39
DIAL@UCLouvain (Université catholique de Louvain)
33
DIAL@USL-B (Université Saint-Louis, Bruxelles)
33
University College London: UCL Discovery
32
Aarhus University: Research
31
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam)
31
Frontiers: Figshare
30
University of Copenhagen: Research
30
Vrije Universiteit Amsterdam (VU): Research Portal
30
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
30
SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy)
28
MDPI Open Access Publishing
26
University of East Anglia: UEA Digital Repository
26
Université de Bretagne Occidentale: HAL
26
EPHE (Ecole pratique des hautes études, Paris): HAL
25
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