Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
510
University of Calgary Journal Hosting
4
Memorial University of Newfoundland: Research Repository
2
University of Central Florida (UCF): STARS (Showcase of Text, Archives, Research & Scholarship)
2
Unknown
2
Wiley Online Library (via Crossref)
2
Aarhus University: Research
1
Cambridge University Press
1
Canadian Science Publishing (via Crossref)
1
University of Alaska: ScholarWorks@UA
1
University of Copenhagen: Research
1
University of Liège: ORBi (Open Repository and Bibliography)
1
Wiley Online Library
1