Der Betriebswirt, Vol. 52 (2011), Iss. 3 : pp. 10–14 | First published online: July 09, 2019
Der Betriebswirt, Vol. 52 (2011), Iss. 1 : pp. 28–32 | First published online: July 09, 2019
Der Betriebswirt, Vol. 52 (2011), Iss. 2 : pp. 12–16 | First published online: July 09, 2019
