Content Provider
OpenAgrar (OA)
48
JKI Open Journal Systems (Julius Kühn-Institut)
17
Directory of Open Access Journals: DOAJ Articles
8
DataCite Metadata Store (German National Library of Science and Technology)
7
Organic Eprints (Danish Research Centre for Organic Farming, DARCOF)
7
Springer Nature (via Crossref)
7
Publication Server of Goethe University Frankfurt am Main
4
Digital Repository of Scientific Institutes (RCIN)
3
Contributions to Entomology = Beiträge zur Entomologie (E-Journal)
2
University of Potsdam: publish.UP
2
Universität Leipzig: Qucosa
2
Digitales Repositorium der Stadt- und Landesbibliothek Potsdam
1
Georg-August-Universität Göttingen: GOEDOC
1
Georg-August-Universität Göttingen: eDiss
1
Publication Server of Greifswald University
1
Publication Server of Tier University (OPUS)
1
Unknown
1