Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
225
Directory of Open Access Journals: DOAJ Articles
162
Defense Technical Information Center: DTIC Technical Reports database
104
Unknown
82
PANGAEA - Data Publisher for Earth & Environmental Science
58
Copernicus Publications: E-Journals
47
Wiley Online Library
43
PubMed Central (PMC)
40
Niedersächsisches Online-Archiv NOA
35
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
29
University of Calgary Journal Hosting
29
Institut national des sciences de l'Univers: HAL-INSU
27
MDPI Open Access Publishing
25
University of Alaska: ScholarWorks@UA
25
Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP)
22
Université de Nantes: HAL-UNIV-NANTES
22
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
19
HAL Sorbonne Université
18
National Institute of Polar Research Repository, Japan
16
Arctic Portal Library
15
ScienceDirect (Elsevier)
15
PLOS
13
Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR
12
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
12
University of Southampton: e-Prints Soton
12
École Polytechnique, Université Paris-Saclay: HAL
12
HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives)
11
Muséum National d'Histoire Naturelle (MNHM): HAL
11
Naval Postgraduate School: Calhoun
11
Université de Paris: Portail HAL
11
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ
11
Archives ouvertes de Paris-Saclay
10
ScienceDirect (Elsevier - via Crossref)
10
University College London: UCL Discovery
10
University of Washington, Seattle: ResearchWorks
10
Cambridge University Press
9
Springer Nature (via Crossref)
9
University of Maryland: Digital Repository (DRUM)
9
Biodiversity Heritage Library (BHL)
8
University of the Highlands and Islands: Research Database of UHI
8
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
7
HAL de l'Institut Polytechnique de Paris
7
Oxford University Press
7
Xiamen University Institutional Repository
7
Aarhus University: Research
6
ScholarsArchive@OSU (Oregon State University)
6
University of Tromsø: Munin Open Research Archive
6
Université de Bretagne Occidentale: HAL
6
JPL Technical Report Server
5
Natural Environment Research Council: NERC Open Research Archive
5
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