Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
17
Unknown
10
University of Calgary Journal Hosting
9
Aarhus University: OJS at The State and University Library
5
Tidsskrift.dk (The Royal Library, Denmark)
5
Dryad Digital Repository (Duke University)
4
University of Copenhagen: Research
4
Defense Technical Information Center: DTIC Technical Reports database
3
Open Research Library
2
Rijksuniversiteit Groningen: University of Groningen Press
2
Apollo - University of Cambridge Repository
1
Arctic Institute of North America (via Crossref)
1
Cambridge University Press (via Crossref)
1
Canadian Science Publishing
1
Directory of Open Access Journals: DOAJ Articles
1
GEUS Bulletin (Geological Survey of Denmark and Greenland)
1
Informa (via Crossref)
1
Oxford University Press (via Crossref)
1
University of Technology Sydney: OPUS - Open Publications of UTS Scholars
1
Uppsala University: Publications (DiVA)
1
Wiley Online Library (via Crossref)
1
Zenodo
1