Content Provider
University of Michigan: Digital Collections
489
Canadian Science Publishing (via Crossref)
4
DataCite Metadata Store (German National Library of Science and Technology)
3
Memorial University of Newfoundland: Research Repository
3
Australian National University: ANU Digital Collections
2
Brill (via Crossref)
2
University of New Brunswick: Centre for Digital Scholarship Journals
2
Vienna University Library: Digitale Sammlungen
2
JSTOR (via Crossref)
1
University of Wisconsin, Milwaukee: UWM Libraries Digital Collections
1
Unknown
1
Zenodo
1