Trojanowska, Marzena
Ĺwietlik, Ryszard http://orcid.org/0000-0002-3188-8204
Funding for this research was provided by:
University of Technology and Humanities in Radom (No 3110/35/P)
Article History
Received: 27 April 2019
Accepted: 30 July 2019
First Online: 20 August 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.