Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
12
Unknown
7
EconStor (German National Library of Economics, ZBW)
4
Bavarian Digital Repository (BDR - Bayerische Staatsbibliothek Munich, BSB)
3
Directory of Open Access Books (DOAB)
2
Publication Server of Goethe University Frankfurt am Main
2
University of Vienna: Phaidra
2
Zenodo
2
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
1
DIAL@USL-B (Université Saint-Louis, Bruxelles)
1
Digital Library Thüringen
1
ETH Zürich Research Collection
1
FIRe! - Publikationsserver des FIZBw (Fachinformationszentrum der Bundeswehr)
1
Frankfurt/Main University Library: Digitale Sammlungen
1
Open Research Library
1
PUB - Publications at Bielefeld University
1
Springer Nature (via Crossref)
1
TU Braunschweig: LeoPARD - Publications And Research Data
1
ULB Düsseldorf: Digitale Sammlungen (University Library of Düsseldorf University)
1
UQAM - Université du Québec à Montréal: archipel
1
University of Potsdam: publish.UP
1
Wiley Online Library
1
ZFDM Repository (Center for Sustainable Research Data Management, Hamburg University)
1
ediss.sub.hamburg (Staats- und Universitätsbibliothek Hamburg, Carl von Ossietzky)
1
epub.oeaw (The digital publication portal of the Austrian Academy of Sciences)
1