Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
15
Dryad Digital Repository (Duke University)
2
Kew Research Repository
2
Zenodo
2
CESSDA DC Data Catalogue (Consortium of European Social Science Data Archives)
1
NTNU Open Archive (Norwegian University of Science and Technology)
1
PubMed Central (PMC)
1
Qatar University: QU Institutional Repository
1
Unknown
1
Wiley Online Library
1
Wiley Online Library (via Crossref)
1