Content Provider
Cambridge University Press
5
Canadian Science Publishing
3
University of Copenhagen: Research
2
ARPI - Archivio della Ricerca dell'Università di Pisa
1
DataCite Metadata Store (German National Library of Science and Technology)
1
Digital.CSIC (Spanish National Research Council)
1
Directory of Open Access Journals: DOAJ Articles
1
Lund University Publications (LUP)
1
ScienceDirect (Elsevier - via Crossref)
1
ScienceDirect (Elsevier)
1
University of New Brunswick: Centre for Digital Scholarship Journals
1
University of Waterloo, Canada: Institutional Repository
1