Content Provider
Informa (via Crossref)
103
Informa
30
University of Alaska: ScholarWorks@UA
3
University of Alberta: Era - Education and Research Archive
3
Oxford University Press (via Crossref)
2
The Royal Society: Figshare
2
University of California: eScholarship
2
CDC Stacks (Centers for Disease Control and Prevention)
1
Ovid (via Crossref)
1
ScienceDirect (Elsevier - via Crossref)
1
University of Malta: OAR@UM
1
University of Nebraska-Lincoln: DigitalCommons@UNL
1
University of Nevada, Las Vegas: Digital Scholarship@UNLV
1
University of Northern Iowa: UNI ScholarWorks
1
University of Washington, Seattle: ResearchWorks
1
Unknown
1
Wiley Online Library
1
Wiley Online Library (via Crossref)
1