Content Provider
MDPI Open Access Publishing
3
Zenodo
3
Digital.CSIC (Spanish National Research Council)
2
Directory of Open Access Journals: DOAJ Articles
2
Biodiversity Heritage Library (BHL)
1
Dartmouth Digital Commons (Dartmouth College)
1
DataCite Metadata Store (German National Library of Science and Technology)
1
Digital Repository of Scientific Institutes (RCIN)
1
Fondazione Edmund Mach: IRIS-OpenPub
1
PEARL (Plymouth Electronic Archiv & ResearchLibrary, Plymouth University)
1
Pensoft Publishers
1
Repository of the University of Ljubljana (RUL)
1
Universidad de León: BULERIA
1
Università degli Studi di Trento: CINECA IRIS
1