Authors
Jakub Marcinkowski
Wroclaw University of Economics and Business, Wroclaw, Poland
Sławomir Czetwertyński
slawomir.czetwertynski@ue.wroc.pl
Wroclaw University of Economics and Business, Wroclaw, Poland
Małgorzata Markowska
malgorzata.markowska@ue.wroc.pl
Wroclaw University of Economics and Business, Wroclaw, Poland
Andrzej Sokołowski
andrzej.sokolowski@uek.krakow.pl
Andrzej Frycz Modrzewski University in Cracow, Cracow, Poland