Content Provider
Directory of Open Access Journals: DOAJ Articles
461
Columbia University: Academic Commons
4
HELDA – University of Helsinki Open Repository
2
DataCite Metadata Store (German National Library of Science and Technology)
1
Griffith University: Griffith Research Online
1
Jultika - University of Oulu repository
1
Koç University Suna Kıraç Library’ Digital Collections
1