Sakson, Grazyna
Brzezinska, Agnieszka
Zawilski, Marek
Funding for this research was provided by:
the European Union from the European Fund of Regional Development (POIG.01.01.02-10-106/09-00)
Article History
Received: 15 February 2017
Accepted: 2 April 2018
First Online: 14 April 2018