Content Provider
Directory of Open Access Journals: DOAJ Articles
3
DataCite Metadata Store (German National Library of Science and Technology)
2
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
1
Canadian Science Publishing (via Crossref)
1
Carleton University's Institutional Repository
1
Institut national des sciences de l'Univers: HAL-INSU
1
NIOZ Repository (Royal Netherlands Institute for Sea Research)
1
Niedersächsisches Online-Archiv NOA
1
SAGE Publications (via Crossref)
1
Unknown
1
Utrecht University Repository
1
Xiamen University Institutional Repository
1