Content Provider
Directory of Open Access Journals: DOAJ Articles
33
Frontiers: Figshare
21
MDPI Open Access Publishing
13
DataCite
6
DataCite Metadata Store (German National Library of Science and Technology)
6
University of California: eScholarship
6
Unknown
6
University of Liège: ORBi (Open Repository and Bibliography)
4
Zenodo
4
Jagiellonian University Repository
3
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
2
Australian National University: ANU Digital Collections
2
Freie Universität Berlin: Refubium (FU Berlin)
2
Pensoft Publishers
2
University of Tasmania: UTas ePrints
2
Università degli Studi di Messina: IRIS
2
Aarhus University: Research
1
BOKU:ePUB (Publikationsserver der Universitätsbibliothek Bodenkultur Wien)
1
Eötvös Loránd University: ELTE Digital Institutional Repository (EDIT)
1
HAL Lyon 1 (University Claude Bernard Lyon 1)
1
HAL Sorbonne Université
1
Harvard University: DASH - Digital Access to Scholarship at Harvard
1
INSA Lyon HAL (Institut National des Sciences Appliquées)
1
Imperial College London: Spiral
1
Institut national des sciences de l'Univers: HAL-INSU
1
MACAU: Open Access Repository of Kiel University
1
Magnolia press
1
Portail HAL - Ecole Centrale de Lyon
1
PubMed Central (PMC)
1
Repository of the University of Ljubljana (RUL)
1
Repositório Aberto da Universidade do Porto
1
UFZ - Publication Index (Helmholtz-Centre for Environmental Research)
1
Universidad Autónoma de Madrid (UAM): Biblos-e Archivo
1
Universidade Estadual Paulista São Paulo: Repositório Institucional UNESP
1
Universidade Federal de São Paulo (UNIFESP): Repositório Institucional
1
University of Bristol: Bristol Research
1
Università degli Studi di Napoli "Parthenope": CINECA IRIS
1
Université Grenoble Alpes: HAL
1
Université Savoie Mont Blanc: HAL
1
Université de Nantes: HAL-UNIV-NANTES
1
VTT's Research Information Portal
1