1. a Business Partners Club, Poznań University of Economics and Business, al. Niepodległości 10, 61-875 Poznań, Poland
2. b Institute of Management, Poznań University of Economics and Business, al. Niepodległości 10, 61-875 Poznań, Poland
3. c College of Management, Department of Entrepreneurship, University of Economics in Katowice, ul. 1go Maja 50, 40-287 Katowice, Poland
4. d Faculty of Economic Sciences and Management, Department of Enterprise Management, Nicolaus Copernicus University, ul. Gagarina 13A, 87-100 Toruń, Poland