Bock, Otmar http://orcid.org/0000-0003-0485-6765
Bury, Nils http://orcid.org/0000-0002-6119-2478
Funding for this research was provided by:
Bundesministerium für Wirtschaft und Energie (50WB0726)
Article History
Received: 6 January 2019
Accepted: 27 January 2020
First Online: 3 March 2020
Competing interests
: The authors declare no competing interests.