Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
40
Directory of Open Access Journals: DOAJ Articles
10
GEO-LEOe-docs (FID GEO)
8
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
WikiBooks - Open-content textbooks
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 (via Crossref)
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
Publication Server of the Justus-Liebig-University of Giessen
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
ediss.sub.hamburg (Staats- und Universitätsbibliothek Hamburg, Carl von Ossietzky)
2
Augsburg University Publication Server (OPUS)
1
Bayreuth University: EPub Bayreuth
1
Digital Library Thüringen
1
Doria (National Library of Finland)
1
Federation of Finnish Learned Societies: Scientific Journals Online
1
Helsingfors Universitet: HELDA – Helsingin yliopiston digitaalinen arkisto
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
Wiley Online Library
1
Wissenschaftliche Verlagsgesellschaft Stuttgart (via Crossref)
1
Zenodo
1