Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
34
Directory of Open Access Journals: DOAJ Articles
21
The Royal Society: Figshare
11
Swedish University of Agricultural Sciences (SLU): Epsilon Open Archive
8
Unknown
6
Cambridge University Press
3
Lund University Publications (LUP)
3
Uppsala University: Publications (DiVA)
2
Aarhus University: Research
1
DRO - Deakin Research Online
1
Defense Technical Information Center: DTIC Technical Reports database
1
Duke University Libraries: DukeSpace
1
Frontiers: Figshare
1
University of California: eScholarship
1
University of Windsor, Ontario: Scholarship at UWindsor
1