Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
39
Hathi Trust Digital Library
17
Springer Nature (via Crossref)
14
DigiZeitschriften: The German digital journal archive (Göttingen University Library)
11
Doria (National Library of Finland)
11
Georg-August-Universität Göttingen: GOEDOC
8
Frankfurt/Main University Library: Digitale Sammlungen
6
Staatsbibliothek zu Berlin: Digitised Collections
5
Unknown
5
Natural Resources Institute Finland: Jukuri
4
University of Michigan: Digital Collections
4
University of Tartu: Dspace
4
e-rara.ch (ETH Zürich)
4
Directory of Open Access Journals: DOAJ Articles
3
Federation of Finnish Learned Societies: Scientific Journals Online
3
Max Planck Society: MPG.PuRe
3
Digital Repository of Scientific Institutes (RCIN)
2
Helsingfors Universitet: HELDA – Helsingin yliopiston digitaalinen arkisto
2
Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen)
2
TU Wien: reposiTUm
2
Tampere University: Trepo
2
University of Freiburg: FreiDok
2
University of Vienna: Phaidra
2
WDB - Wolfenbüttel Digital Library (HAB - Herzog-August-Bibliothek Wolfenbüttel)
2
BORIS (Bern Open Repository and Information System, University of Bern)
1
Eberhard Karls University Tübingen: Publication System
1
Freie Universität Berlin: Refubium (FU Berlin)
1
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam)
1
Gallica - bibliothèque numérique de la Bibliothèque nationale de France (BnF)
1
HELDA – University of Helsinki Open Repository
1
Heidelberg University Library: Heidelberg historic literature - digitized
1
Informa (via Crossref)
1
Jagiellonian University Repository
1
Jagiellonian University: Jagiellonian Digital Library
1
Jultika - University of Oulu repository
1
LaCRIS - University of Lapland Current Research System
1
Linnaeus University Kalmar Växjö: Publications (DiVA)
1
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
1
PsychArchives
1
Publication Server of Goethe University Frankfurt am Main
1
RERO DOC Digital Library
1
RWTH Aachen University: RWTH Publications
1
RegionaliaOpen – Open-Access-Publikationsserver für den Südwesten
1
Share it - Open Access und Forschungsdaten-Repositorium der Hochschulbibliotheken in Sachsen-Anhalt
1
University of Innsbruck: Digital Library (Universitäts- und Landesbibliothek Tirol)
1
University of Münster: Digital Collections
1
University of Potsdam: publish.UP
1
Universitäts- und Landesbibliothek Sachsen-Anhalt: Bibliotheca Ponickaviana
1
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ
1
Uppsala University: Publications (DiVA)
1