Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
5,132
Copernicus Publications: E-Journals
3
National Institute of Radiological Science: NIRS-Repository
3
Directory of Open Access Journals: DOAJ Articles
2
Niedersächsisches Online-Archiv NOA
2
PubMed Central (PMC)
2
ScienceDirect (Elsevier - via Crossref)
2
Zenodo
2
ArXiv.org (Cornell University Library)
1
HELDA – University of Helsinki Open Repository
1
National Institute of Polar Research Repository, Japan
1
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research)
1
Springer Nature (via Crossref)
1