Content Provider
Directory of Open Access Journals: DOAJ Articles
80
Niedersächsisches Online-Archiv NOA
23
Wiley Online Library
21
Unknown
20
University of Calgary Journal Hosting
19
DataCite Metadata Store (German National Library of Science and Technology)
18
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
12
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
12
Institut national des sciences de l'Univers: HAL-INSU
11
Aarhus University: Research
9
Vrije Universiteit Amsterdam (VU): Research Portal
9
Cambridge University Press
8
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research)
8
Royal Holloway University of London: Royal Holloway Digital Repository
7
University of Tromsø: Munin Open Research Archive
7
Université de Nantes: HAL-UNIV-NANTES
7
Apollo - University of Cambridge Repository
6
Max Planck Society: MPG.PuRe
6
Springer Nature (via Crossref)
6
Natural Environment Research Council: NERC Open Research Archive
5
HAL Sorbonne Université
4
Lund University Publications (LUP)
4
Northumbria University, Newcastle: Northumbria Research Link (NRL)
4
Technical University of Denmark: DTU Orbit
4
Universitet i Oslo: Digitale utgivelser ved UiO (DUO)
4
University of California: eScholarship
4
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
3
Canadian Science Publishing
3
Canadian Science Publishing (via Crossref)
3
HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives)
3
HELDA – University of Helsinki Open Repository
3
Plymouth Marine Science Electronic Archive (PlyMSEA - Plymouth Marine Laboratory, PML)
3
Polar Research (E-Journal)
3
University of Bristol: Bristol Research
3
University of Groningen research database
3
University of Southampton: e-Prints Soton
3
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ
3
Wageningen UR (University & Research Centre): Digital Library
3
Zenodo
3
ASM Journals (American Society for Microbiology)
2
Archives ouvertes de Paris-Saclay
2
Arctic Portal Library
2
BORIS (Bern Open Repository and Information System, University of Bern)
2
DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB)
2
DIAL@UCLouvain (Université catholique de Louvain)
2
DIAL@USL-B (Université Saint-Louis, Bruxelles)
2
DORA Eawag
2
ETH Zürich Research Collection
2
Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia)
2
Freie Universität Berlin: Refubium (FU Berlin)
2
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