Varga, Ivan
Danišovič, Ľuboš
Kachlík, David
Beňuš, Radoslav
Klein, Martin
Article History
Received: 8 July 2019
Accepted: 2 September 2019
First Online: 9 September 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
Free to read: This content has been made available to all.