Content Provider
Defense Technical Information Center: DTIC Technical Reports database
417
Directory of Open Access Journals: DOAJ Articles
74
DataCite Metadata Store (German National Library of Science and Technology)
43
Copernicus Publications: E-Journals
41
Unknown
38
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
30
Niedersächsisches Online-Archiv NOA
26
Institut national des sciences de l'Univers: HAL-INSU
20
Université de Nantes: HAL-UNIV-NANTES
19
PANGAEA - Data Publisher for Earth & Environmental Science
17
PubMed Central (PMC)
17
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
16
MDPI Open Access Publishing
14
Vrije Universiteit Amsterdam (VU): Research Portal
13
Northumbria University, Newcastle: Northumbria Research Link (NRL)
10
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
10
HAL Sorbonne Université
9
Tomsk State University Research Library
9
Wiley Online Library
9
Hereon Publications (Helmholtz-Zentrum)
8
ETH Zürich Research Collection
7
Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen)
7
Springer Nature (via Crossref)
7
The University of Manchester: Research Explorer
7
University of Tromsø: Munin Open Research Archive
7
Freie Universität Berlin: Refubium (FU Berlin)
6
Stockholm University: Publications (DiVA)
6
University of Potsdam: publish.UP
6
Aarhus University: Research
5
Archives ouvertes de Paris-Saclay
5
Lund University Publications (LUP)
5
Météo-France: HAL
5
NIOZ Repository (Royal Netherlands Institute for Sea Research)
5
Umeå University: Publications (DiVA)
5
University of Calgary Journal Hosting
5
Utrecht University Repository
5
Apollo - University of Cambridge Repository
4
HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives)
4
Polar Research (E-Journal)
4
Swedish Museum of Natural History: Publications (DiVA)
4
University of Alaska: ScholarWorks@UA
4
University of Bergen: Bergen Open Research Archive (BORA-UiB)
4
Uppsala University: Publications (DiVA)
4
Arctic Council Repository
3
BioOne Online Journals
3
DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB)
3
Florida State University Digital Library (FSUDL)
3
Florida State University: DigiNole Commons
3
ORA - Oxford University Research Archive
3
Tomsk Polytechnic University (TPU): Electronic Archive
3
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