Content Provider
University of California: eScholarship
5
SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy)
4
Aarhus University: Research
2
LaCRIS - University of Lapland Current Research System
2
University of Copenhagen: Research
2
University of Tromsø: Munin Open Research Archive
2
Utrecht University Repository
2
Vrije Universiteit Amsterdam (VU): Research Portal
2
IRUA - Institutional Repository van de Universiteit Antwerpen
1
Lund University Publications (LUP)
1
Macquarie University Research Portal
1
Munich University of Technology (TUM): mediaTUM
1
NTNU Open Archive (Norwegian University of Science and Technology)
1
Springer Nature (via Crossref)
1
Umeå University: Publications (DiVA)
1
University of Western Sydney (UWS): Research Direct
1