Content Provider
LeibnizOpen (The Leibniz Association)
16
Unknown
3
DataCite Metadata Store (German National Library of Science and Technology)
1
Directory of Open Access Journals: DOAJ Articles
1
MDPI Open Access Publishing
1
Open-Access-Publikationsserver der Humboldt-Universität: edoc-Server
1
PUBLISSO Fachrepositorium Lebenswissenschaften (ZB MED)
1