Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
15
Springer Nature (via Crossref)
9
Thieme
6
Directory of Open Access Journals: DOAJ Articles
4
Böhlau Verlag (via Crossref)
2
Robert Koch Institute: Publications
2
Unknown
2
hogrefe
2
Journal für Psychoanalyse (Psychoanalytisches Seminar Zürich - PSZ)
1
OpenAgrar (OA)
1
Publication Server of Goethe University Frankfurt am Main
1
ULB Düsseldorf: Digitale Sammlungen (University Library of Düsseldorf University)
1
University of Zurich (UZH): HOPE (Hauptbibliothek Open Publishing Environment)
1
University of Zurich (UZH): ZORA (Zurich Open Repository and Archive
1
epub.oeaw (The digital publication portal of the Austrian Academy of Sciences)
1