Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
41
Directory of Open Access Journals: DOAJ Articles
10
GEO-LEOe-docs (FID GEO)
8
WikiBooks - Open-content textbooks
6
Ike Skelton Combined Arms Research Library (CARL) Digital Library
5
Max Planck Society: MPG.PuRe
5
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
5
DigiZeitschriften: The German digital journal archive (Göttingen University Library)
4
German Aerospace Center: elib - DLR electronic library
4
Publication Server of Goethe University Frankfurt am Main
4
Wiley Online Library
4
Publication Server of the Justus-Liebig-University of Giessen
3
ZFDM Repository (Center for Sustainable Research Data Management, Hamburg University)
3
Cologne University: KUPS
2
DBGPrints-Archive (German Soil Science Society)
2
Frankfurt/Main University Library: Digitale Sammlungen
2
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam)
2
Springer Nature (via Crossref)
2
University of Freiburg: FreiDok
2
University of Zurich (UZH): ZORA (Zurich Open Repository and Archive
2
Unknown
2
Würzburg University: Online Publication Service
2
Zenodo
2
ediss.sub.hamburg (Staats- und Universitätsbibliothek Hamburg, Carl von Ossietzky)
2
Augsburg University Publication Server (OPUS)
1
BORIS (Bern Open Repository and Information System, University of Bern)
1
Bayreuth University: EPub Bayreuth
1
DataCite
1
Digital Library Thüringen
1
Doria (National Library of Finland)
1
Federation of Finnish Learned Societies: Scientific Journals Online
1
HELDA – University of Helsinki Open Repository
1
Hathi Trust Digital Library
1
Justus-Liebig-Universität Giessen: JLUpub
1
Norsk Polarinstitutt: Brage NP
1
Norwegian Polar Institute: Brage NP
1
OpenAgrar (OA)
1
SZTE OJS Journals (University of Szeged)
1
ScienceDirect (Elsevier)
1
University of Potsdam: publish.UP
1
University of St. Gallen: Research Platform Alexandria
1
University of Szeged: SZTE Repository of Papers and Books
1
Vetmeduni Vienna Phaidra (University of Veterinary Medicine, Vienna)
1
Wissenschaftliche Verlagsgesellschaft Stuttgart
1