Alkan, Cemil https://orcid.org/0000-0002-1509-4789
Rathgeber, Christoph
Hennemann, Peter
Hiebler, Stefan
Funding for this research was provided by:
German Federal Ministry of Economics and Technology (0327851D)
Article History
Received: 18 December 2017
Revised: 1 August 2018
Accepted: 7 August 2018
First Online: 14 August 2018