Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
236
Directory of Open Access Journals: DOAJ Articles
17
Aarhus University: Research
14
Unknown
13
Bergen Open Access Publishing (University of Bergen Library)
8
CyberLeninka (Scientific Electronic Library)
8
NORA (National aggregator of open repositories of Russian universities)
8
Wiley Online Library (via Crossref)
8
Kazan Federal University Digital Repository
7
Zenodo
6
PubMed Central (PMC)
5
Research Center for Eco-Environmental Sciences: RCEES OpenIR (Chinese Academy of Sciences)
5
Cambridge University Press
4
Doria (National Library of Finland)
4
Dryad Digital Repository (Duke University)
4
Jultika - University of Oulu repository
4
ScienceDirect (Elsevier - via Crossref)
4
University of Debrecen Electronic Archive (DEA)
4
Wiley Online Library
4
Biodiversity Heritage Library (BHL)
2
Frankfurt/Main University Library: Digitale Sammlungen
2
LAEI VL (Lithuanian Institute of Agrarian Economics Virtual Library)
2
LSRC VL (Lithuanian Social Research Centre Virtual Library)
2
MDPI Open Access Publishing
2
Max Planck Society: MPG.PuRe
2
Norwegian Institute for Nature Research: Brage NINA
2
Springer Nature (via Crossref)
2
Swedish environmental protection agency: Publications (DiVA)
2
University of Nebraska-Lincoln: DigitalCommons@UNL
2
University of Tromsø: Munin Open Research Archive
2
Wageningen UR (University & Research Centre): Digital Library
2
Ιδρυματικό Αποθετήριο HELLANICUS
2
Altai State University: Scientific Journals of ASU
1
Data Archiving and Networked Services (DANS): EASY (KNAW - Koninklijke Nederlandse Akademie van Wetenschappen)
1
Duke University Press (via Crossref)
1
Federation of Finnish Learned Societies: Scientific Journals Online
1
Frontiers (Publisher)
1
Frontiers: Figshare
1
JYX - Jyväskylä University Digital Archive
1
KNAW: Research Explorer (Royal Netherlands Academy of Arts and Sciences)
1
KOPS - The Institutional Repository of the University of Konstanz
1
KovsieScholar Repository (University of the Free State - UFS UV)
1
Lund University Publications (LUP)
1
MTAK: REAL (Library and Information Centre of the Hungarian Academy of Sciences
1
Macquarie University Research Portal
1
National Institute for Health and Welfare (THL), Finland: Julkari
1
National Library of Estonia: DIGAR - Digital Archiive
1
Natural Resources Institute Finland: Jukuri
1
Open Journals at Lund University (OJLU)
1
Oxford University Press (via Crossref)
1
more ...