1. Department of Management, Economics and Finance, Faculty of Engineering Management, Bialystok University of Technology, 15-351 Bialystok, Poland
2. Faculty of Management, Department of Strategic Development, University of Gdansk, 80-309 Gdansk, Poland
3. Department of Market, Marketing and Quality, Collegium of Management and Finance, SGH Warsaw School of Economics, 02-554 Warsaw, Poland
4. Faculty of Management, Bucharest University of Economic Studies, 010374 București, Romania
5. Management Institute, Warsaw University of Life Sciences, 02-787 Warsaw, Poland