Content Provider
Canadian Science Publishing
8
Canadian Science Publishing (via Crossref)
8
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas)
3
Cambridge University Press
2
University of St Andrews: Research Portal
2
Biodiversity Heritage Library (BHL)
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