Content Provider
Institute for Marine Research: Brage IMR
5
Technical University of Denmark: DTU Orbit
4
HighWire Press (Stanford University)
3
University of Strathclyde Glasgow: Strathprints
3
Oxford University Press
2
DataCite Metadata Store (German National Library of Science and Technology)
1
Directory of Open Access Journals: DOAJ Articles
1
Oxford University Press (via Crossref)
1
Wiley Online Library
1