Content Provider
De Gruyter (via Crossref)
33
Cambridge University Press
23
Directory of Open Access Journals: DOAJ Articles
15
DataCite Metadata Store (German National Library of Science and Technology)
7
Sciendo (de Gruyter - via CrossRef)
5
SAGE Publications
3
Springer Nature (via Crossref)
3
University of the Highlands and Islands: Research Database of UHI
3
Wiley Online Library (via Crossref)
3
Cambridge University Press (via Crossref)
2
De Gruyter
2
Oxford University Press
2
ASM Journals (American Society for Microbiology)
1
Australian National University: ANU Digital Collections
1
Norwegian Institute for Nature Research: Brage NINA
1
Opin vĂsindi (Iceland)
1
ScienceDirect (Elsevier - via Crossref)
1
Swedish University of Agricultural Sciences (SLU): Epsilon Open Archive
1
Universidade do Algarve: Sapienta
1
Wiley Online Library
1