Content Provider
MDPI Open Access Publishing
10
Unknown
4
Digital Repository of Scientific Institutes (RCIN)
2
DataCite Metadata Store (German National Library of Science and Technology)
1
Emory Law Scholarly Commons
1
University of Michigan Law School: Scholarship Repository
1
University of Nebraska-Lincoln: DigitalCommons@UNL
1
University of North Texas: UNT Digital Library
1