1 | Faculty of Management, Bialystok University of Technology, Ojca Tarasiuka 2, 16-001 Kleosin, Poland |
2 | Faculty of Civil and Environmental Engineering, Bialystok University of Technology, Wiejska 45A, 15-351 Bialystok, Poland |
3 | Faculty of Economics and Management, Aleksandras Stulginskis University, Universiteto 10, LT-53361, Akademija Kaunas, Lithuania |