1. 1University of Primorska, Faculty of Management, Koper, Slovenia
2. 2Samsung SDI Battery Systems Ltd, Premstätten, Austria
3. 3University of Maribor, Faculty of Economics and Business, Razglova 14, 2000 Maribor, Slovenia
4. 4University of Applied Sciences FH Joanneum, Graz, Austria
5. 5University of Maribor, Faculty of Economics and Business, Maribor, Slovenia