Funding for this research was provided by:
Narodowe Centrum Nauki (2017/27/B/ST8/01477)
Akademia Górniczo-Hutnicza im. Stanislawa Staszica (11.11.160.365)
European Social Fund (POWR.03.02.00-00-I004/16)
Article History
Received: 3 February 2019
Accepted: 19 July 2019
First Online: 30 July 2019