Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
3
Zenodo
3
Charles University CU Digital repository
2
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
1
Directory of Open Access Journals: DOAJ Articles
1
Samara University Journals
1
University of Groningen research database
1
Université de Nantes: HAL-UNIV-NANTES
1