Content Provider
Cambridge University Press
84
ScienceDirect (Elsevier - via Crossref)
38
Directory of Open Access Journals: DOAJ Articles
20
DataCite Metadata Store (German National Library of Science and Technology)
6
Frontiers (Publisher)
4
ScienceDirect (Elsevier)
4
Springer Nature (via Crossref)
3
De Gruyter (via Crossref)
2
Cambridge University Press (via Crossref)
1
Sciendo (de Gruyter - via CrossRef)
1
eCite UTAS (University of Tasmania)
1