Content Provider
WikiBooks - Open-content textbooks
29
Directory of Open Access Journals: DOAJ Articles
2
University of Michigan: Digital Collections
2
DataCite Metadata Store (German National Library of Science and Technology)
1
Hungarian Electronic Library (MEK)
1
IRIS Università degli Studi di Palermo
1
Journals of Faculty of Arts, University of Ljubljana
1
University of Parma: DSpaceUnipr
1
Università degli studi di Trieste: ArTS (Archivio della ricerca di Trieste)
1
Unknown
1