Content Provider
Directory of Open Access Journals: DOAJ Articles
8
DataCite Metadata Store (German National Library of Science and Technology)
2
The Repository of the University of Silesia (RE-BUŚ)
2
AMUR - Adam Mickiewicz University Repository, Poznan
1
JYX - Jyväskylä University Digital Archive
1
MDPI Open Access Publishing
1
Pensoft Publishers
1
University of Bath's research portal
1
Unknown
1