Content Provider
Directory of Open Access Journals: DOAJ Articles
3
MDPI Open Access Publishing
3
Unknown
3
Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires)
2
Caltech Authors (California Institute of Technology)
1
DataCite Metadata Store (German National Library of Science and Technology)
1
National Technical University of Athens (NTUA): DSpace
1
University of Arkansas: ScholarWorks@UARK
1
University of Liège: ORBi (Open Repository and Bibliography)
1
University of Stavanger: UiS Brage
1
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
1
Zenodo
1