Käufer, Theo http://orcid.org/0000-0001-7121-8291
König, Jörg http://orcid.org/0000-0002-7832-9223
Cierpka, Christian http://orcid.org/0000-0002-8464-5513
Funding for this research was provided by:
Thüringer Ministerium für Wirtschaft, Wissenschaft und Digitale Gesellschaft
Projekt DEAL
Article History
Received: 31 August 2020
Revised: 24 November 2020
Accepted: 1 December 2020
First Online: 1 March 2021