Content Provider
PANGAEA - Data Publisher for Earth & Environmental Science
33
DataCite Metadata Store (German National Library of Science and Technology)
15
Defense Technical Information Center: DTIC Technical Reports database
9
Unknown
7
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
5
Copernicus Publications: E-Journals
3
Directory of Open Access Journals: DOAJ Articles
3
Max Planck Society: MPG.PuRe
3
University of Bergen: Bergen Open Research Archive (BORA-UiB)
3
University of Wisconsin, Milwaukee: UWM Libraries Digital Collections
3
Niedersächsisches Online-Archiv NOA
2
University of Calgary Journal Hosting
2
BORIS (Bern Open Repository and Information System, University of Bern)
1
Digital.CSIC (Spanish National Research Council)
1
Hereon Publications (Helmholtz-Zentrum)
1
HighWire Press (Stanford University)
1
Institute for Marine Research: Brage IMR
1
Instituto Español de Oceanografía: e-IEO
1
Leuphana University of Lüneburg: Forschungsindex FOX
1
NIOZ Repository (Royal Netherlands Institute for Sea Research)
1
OpenAgrar (OA)
1
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research)
1
Springer Nature (via Crossref)
1
The Royal Society (via Crossref)
1
Theses Canada/Thèses Canada (Library and Archives Canada)
1
University of Groningen research database
1
University of North Texas: UNT Digital Library
1
University of Tromsø: Munin Open Research Archive
1
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
1
Zenodo
1