Król, Piotr http://orcid.org/0000-0003-2423-6731
Król, Bożena http://orcid.org/0000-0001-8941-9059
Funding for this research was provided by:
Rzeszow University of Technology (U-DS.CS.18.001)
Article History
Received: 28 May 2019
Accepted: 22 August 2019
First Online: 3 September 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.