Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
29
PubMed Central (PMC)
6
ScienceDirect (Elsevier - via Crossref)
3
Springer Nature (via Crossref)
3
PLOS
2
University of Calgary Journal Hosting
2
Wiley Online Library
2
University of the Highlands and Islands: Research Database of UHI
1