Content Provider
LeibnizOpen (The Leibniz Association)
21
University of Copenhagen: Research
16
DataCite Metadata Store (German National Library of Science and Technology)
7
ePLUS - Open Access Publikationsserver der Universität Salzburg
7
Danish Defense Research Portal
3
NTNU Open Archive (Norwegian University of Science and Technology)
3
University of Southern Denmark Research Portal
3
Unknown
3
ZFDM Repository (Center for Sustainable Research Data Management, Hamburg University)
3
Aarhus University: Research
2
Natural Resources Institute Finland: Jukuri
2
Norwegian Institute of international affairs: NUPI Research Online (Brage)
2
Open archive Nord universitet
2
Roskilde University Research Portal (RUC)
2
Aalborg University's Research Portal
1
ETH Zürich Research Collection
1
EconStor (German National Library of Economics, ZBW)
1
Eindhoven University of Technology (TU/e): Research Portal
1
Eindhoven University of Technology research portal
1
King's College, London: Research Portal
1
LaCRIS - University of Lapland Current Research System
1
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
1
SSOAR - Social Science Open Access Repository
1
Springer Nature (via Crossref)
1
University of Groningen research database
1
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ
1