Content Provider
Canadian Science Publishing (via Crossref)
5
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas)
3
University of St Andrews: Research Portal
3
Canadian Science Publishing
2
Cambridge University Press
1
DataCite Metadata Store (German National Library of Science and Technology)
1
HELDA – University of Helsinki Open Repository
1
Lund University Publications (LUP)
1
Memorial University of Newfoundland: Research Repository
1
ScienceDirect (Elsevier)
1
University of Chicago Press (via Crossref)
1
University of Copenhagen: Research
1