Przydatek, Grzegorz http://orcid.org/0000-0001-6603-6135
Ciągło, Klaudia
Funding for this research was provided by:
State Higher Vocational School in Nowy Sacz
Article History
Received: 24 May 2019
Accepted: 16 January 2020
First Online: 31 January 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.