Content Provider
Directory of Open Access Journals: DOAJ Articles
65
Unknown
25
DataCite Metadata Store (German National Library of Science and Technology)
17
University of Michigan: Digital Collections
16
Doria (National Library of Finland)
12
Hathi Trust Digital Library
8
Elbląg Digital Library
7
Jagiellonian University Repository
6
Croatian Digital Theses Repository (National and University Library in Zagreb)
5
Digital Library of University of Maribor
5
Bavarian Digital Repository (BDR - Bayerische Staatsbibliothek Munich, BSB)
4
Charles University CU Digital repository
4
Hrčak - Portal of scientific journals of Croatia
4
DataCite
3
Repository of the University of Ljubljana (RUL)
3
University of Zadar Institutional Repository
3
Vrije Universiteit Brussel (VUB): Research Output
3
DigiZeitschriften: The German digital journal archive (Göttingen University Library)
2
Digital Library of the Faculty of Arts, Masaryk University
2
Eberhard Karls University Tübingen: Publication System
2
OLAC: Open Language Archives Community
2
Publication Server of the Justus-Liebig-University of Giessen
2
Springer Nature (via Crossref)
2
epub.oeaw (The digital publication portal of the Austrian Academy of Sciences)
2
BORIS (Bern Open Repository and Information System, University of Bern)
1
Center for Jewish History: Digital Collections
1
Centre for Open Science: CeON Repository
1
Cologne University: KUPS
1
Digital Library of University of Wroclaw
1
Digitální knihovna Univerzity Pardubice
1
Freie Universität Berlin: Refubium (FU Berlin)
1
Georg-August-Universität Göttingen: eDiss
1
Hungarian Electronic Library (MEK)
1
JYX - Jyväskylä University Digital Archive
1
Journals of Faculty of Arts, University of Ljubljana
1
Justus-Liebig-Universität Giessen: JLUpub
1
LaCRIS - University of Lapland Current Research System
1
MACAU: Open Access Repository of Kiel University
1
MENAdoc (Middle East Virtual Library/University and State Library Saxony-Anhalt, Halle)
1
Masaryk University Journals
1
Max Planck Society: MPG.PuRe
1
Open-Access-Publikationsserver der Humboldt-Universität: edoc-Server
1
OpenEdition
1
PUB - Publications at Bielefeld University
1
Philipps-Universität Marburg: Publications
1
Pomeranian Library of Szczecin: Digital Library
1
Psychosozial-Verlag
1
Publication Server of Goethe University Frankfurt am Main
1
RUNIOS - Repository of Josip Juraj Strossmayer University of Osijek
1
Saxon State Library - State and University Library Dresden (SLUB): Qucosa
1
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