Content Provider
PANGAEA - Data Publisher for Earth & Environmental Science
9,837
DataCite Metadata Store (German National Library of Science and Technology)
4,069
Directory of Open Access Journals: DOAJ Articles
1,392
Unknown
1,213
Defense Technical Information Center: DTIC Technical Reports database
1,048
ScienceDirect (Elsevier - via Crossref)
594
Copernicus Publications: E-Journals
582
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
474
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
447
Niedersächsisches Online-Archiv NOA
410
LeibnizOpen (The Leibniz Association)
395
Institut national des sciences de l'Univers: HAL-INSU
382
Springer Nature (via Crossref)
352
PubMed Central (PMC)
332
Université de Nantes: HAL-UNIV-NANTES
292
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
271
University of Tromsø: Munin Open Research Archive
269
HAL Sorbonne Université
231
MDPI Open Access Publishing
192
Wiley Online Library
163
ScienceDirect (Elsevier)
160
Technical University of Denmark: DTU Orbit
155
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ
153
Cambridge University Press
151
University of Southampton: e-Prints Soton
149
Aarhus University: Research
147
University of Bergen: Bergen Open Research Archive (BORA-UiB)
145
Max Planck Society: MPG.PuRe
140
University of Calgary Journal Hosting
138
HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives)
136
Zenodo
132
Biodiversity Heritage Library (BHL)
128
Natural Environment Research Council: NERC Open Research Archive
126
Archives ouvertes de Paris-Saclay
124
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
120
Wiley Online Library (via Crossref)
119
Digital.CSIC (Spanish National Research Council)
113
National Institute of Polar Research Repository, Japan
113
WikiBooks - Open-content textbooks
104
École Polytechnique, Université Paris-Saclay: HAL
104
Université de Paris: Portail HAL
90
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research)
89
Muséum National d'Histoire Naturelle (MNHM): HAL
87
Arctic Portal Library
82
Hathi Trust Digital Library
75
Institute for Marine Research: Brage IMR
73
Washington State University: WSU Libraries Digital Collections
72
Université de Bretagne Occidentale: HAL
68
University College London: UCL Discovery
65
University of North Texas: UNT Digital Library
65
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