Sozialer Fortschritt, Vol. 69 (2020), Iss. 6–7 : pp. 375–394 | First published online: July 22, 2020
Vierteljahrshefte zur Wirtschaftsforschung, Vol. 85 (2016), Iss. 4 : pp. 115–125 | First published online: October 03, 2017
