Content Provider
Frontiers: Figshare
6
DataCite Metadata Store (German National Library of Science and Technology)
5
Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires)
4
KovsieScholar Repository (University of the Free State - UFS UV)
3
Defense Technical Information Center: DTIC Technical Reports database
2
Directory of Open Access Journals: DOAJ Articles
2
Zenodo
2
Australian National University: ANU Digital Collections
1
Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia)
1
Lincoln University (New Zealand): Lincoln U Research Archive
1
MDPI Open Access Publishing
1
Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen)
1
Montclair State University Digital Commons
1
University of California: eScholarship
1
University of Memphis Digital Commons
1