Content Provider
Springer Nature (via Crossref)
14
Max Planck Society: MPG.PuRe
4
Unknown
4
Directory of Open Access Journals: DOAJ Articles
3
Federation of Finnish Learned Societies: Scientific Journals Online
3
Natural Resources Institute Finland: Jukuri
3
Thieme (via Crossref)
3
DataCite Metadata Store (German National Library of Science and Technology)
2
Thieme
2
Helsingfors Universitet: HELDA – Helsingin yliopiston digitaalinen arkisto
1
Informa (via Crossref)
1
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
1
PsychArchives
1
Publication Server of Goethe University Frankfurt am Main
1
RegionaliaOpen – Open-Access-Publikationsserver für den Südwesten
1
University of Potsdam: publish.UP
1
Wiley Online Library (via Crossref)
1