Dąbrowska-Bouta, Beata
Sulkowski, Grzegorz
Strużyński, Witold
Strużyńska, Lidia
Funding for this research was provided by:
Ministerstwo Nauki i Szkolnictwa Wyższego (statutable funds)
Article History
Received: 26 July 2018
Revised: 16 October 2018
Accepted: 30 October 2018
First Online: 8 November 2018