Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
5
Unknown
3
Directory of Open Access Journals: DOAJ Articles
2
Theses Canada/Thèses Canada (Library and Archives Canada)
2
Borealis
1
Cambridge University Press
1
Canadian Science Publishing (via Crossref)
1
Carleton University's Institutional Repository
1
Copernicus Publications: E-Journals
1
Defense Technical Information Center: DTIC Technical Reports database
1
HELDA – University of Helsinki Open Repository
1
Niedersächsisches Online-Archiv NOA
1
PANGAEA - Data Publisher for Earth & Environmental Science
1
Universidade de Lisboa: repositório.UL
1
University of British Columbia: cIRcle - UBC's Information Repository
1
University of Victoria (Canada): UVicDSpace
1
Wiley Online Library
1
uO Research (University of Ottawa - uOttawa)
1