Content Provider
LeibnizOpen (The Leibniz Association)
22
ePLUS - Open Access Publikationsserver der Universität Salzburg
4
Unknown
3
Norwegian Institute of international affairs: NUPI Research Online (Brage)
2
Archives ouvertes de Paris-Saclay
1
Danish Defense Research Portal
1
EconStor (German National Library of Economics, ZBW)
1
NTNU Open Archive (Norwegian University of Science and Technology)
1
Open archive Nord universitet
1
SSOAR - Social Science Open Access Repository
1
University of Copenhagen: Research
1
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ
1