Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
7
Unknown
3
Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires)
2
Northern Illinois University (NIU): Huskie Commons Repository
1
OSKAR Bordeaux (Open Science Knowledge ARchive)
1
Open-Access-Publikationsserver der Humboldt-Universität: edoc-Server
1
University College London: UCL Discovery
1