Applied Economics Quarterly, Vol. 57 (2011), Iss. 4 : pp. 285–301 | First published online: October 03, 2017
Der Betriebswirt, Vol. 53 (2012), Iss. 2 : pp. 13–18 | First published online: July 02, 2019
Vierteljahrshefte zur Wirtschaftsforschung, Vol. 77 (2008), Iss. 4 : pp. 104–109 | First published online: October 03, 2017