Content Provider
ScienceDirect (Elsevier - via Crossref)
22
ScienceDirect (Elsevier)
15
Springer Nature (via Crossref)
5
Cambridge University Press
3
University of Calgary Journal Hosting
3
DataCite Metadata Store (German National Library of Science and Technology)
2
Queen's University Belfast Research Portal
2
Informa (via Crossref)
1
Wiley Online Library
1