Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
8
Data Archiving and Networked Services (DANS): EASY (KNAW - Koninklijke Nederlandse Akademie van Wetenschappen)
4
Dryad Digital Repository (Duke University)
4
Unknown
4
Zenodo
4
Wiley Online Library
3
Natural Resources Institute Finland: Jukuri
2
PubMed Central (PMC)
2
Cardiff University: ORCA (Online Research @ Cardiff)
1
PLOS
1
Wiley Online Library (via Crossref)
1