Thull, David
Zimmer, Felix
Hofmann, Timo
Holtmannspoetter, Jens
Koerwien, Thomas
Hoffmann, Michael http://orcid.org/0000-0001-8261-3983
Funding for this research was provided by:
Bundesministerium für Wirtschaft und Energie (20W1303F)
Article History
Received: 1 March 2019
Accepted: 15 May 2019
First Online: 28 May 2019
Competing interests
: The authors declare that they have no competing interests.