Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
83
GEO-LEOe-docs (FID GEO)
26
Directory of Open Access Journals: DOAJ Articles
15
DigiZeitschriften: The German digital journal archive (Göttingen University Library)
8
Springer Nature (via Crossref)
5
e-rara.ch (ETH Zürich)
3
ETH Zürich Research Collection
2
Münster University (WWU): miami
2
Open-Access-Publikationsserver der Humboldt-Universität: edoc-Server
2
Publication Server of Goethe University Frankfurt am Main
2
Brandenburg University of Technology (BTU): Digital Repository
1
Frankfurt/Main University Library: Digitale Sammlungen
1
Georg-August-Universität Göttingen: GOEDOC
1
Heidelberg University: HeiDok
1
Institutional Repository of Leibniz Universität Hannover
1
Max Planck Society: MPG.PuRe
1
Publikationsdatenbank der Fraunhofer-Gesellschaft
1
SAIC Digital Collections (School of the Art Institute of Chicago)
1
University of Duisburg-Essen: DuEPublico2 (Duisburg Essen Publications online)
1
University of Michigan: Digital Collections
1