Nowak, Dariusz
Gośliński, Michał
Przygoński, Krzysztof
Wojtowicz, Elżbieta
Article History
Received: 4 April 2018
Revised: 25 May 2018
Accepted: 26 May 2018
First Online: 7 June 2018
Compliance with ethical standards
:
: The authors declare that there are no conflicts of interest.
: This article does not contain any studies with human or animal subjects.