Content Provider
Directory of Open Access Journals: DOAJ Articles
38
University of California: eScholarship
4
DataCite Metadata Store (German National Library of Science and Technology)
3
Imperial College London: Spiral
2
ScienceDirect (Elsevier - via Crossref)
2
ScienceDirect (Elsevier)
2
Brigham Young University (BYU): ScholarsArchive
1
TUScholarShare (Temple University)
1
The University of Waikato: Research Commons
1
University of Dayton: eCommons
1