1. Department of Food Product Quality, Krakow University of Economics, 30033 Krakow, Poland
2. Department of Economics, Management and Business Law, University of Bari Aldo Moro, 70124 Bari, Italy
3. Institute of Spatial Management, Wroclaw University of Environmental and Life Sciences, 50375 Wroclaw, Poland
4. Department of Physical Culture and Tourism Management, Jerzy Kukuczka Academy of Physical Education in Katowice, 40065 Katowice, Poland