Szymczak, Czesław
Kujawa, Marcin http://orcid.org/0000-0002-1440-647X
Funding for this research was provided by:
Gdansk University of Technology
Article History
Received: 23 September 2019
Accepted: 2 November 2019
First Online: 15 November 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.