1. Czestochowa University of Technology , Al. Armii Krajowej 19b , Częstochowa , Poland
2. Georgian Technical University , 77 Merab Kostava St , Tbilisi , Georgia
3. VŠB-Technical University of Ostrava , A 504, Sokolská třída 2416/33, 702 00 Ostrava-Moravská Ostrava
4. Polytechnic of Coimbra, ESTGOH, R. Misericórdia Lagar dos Cortiços - S. Martinho do Bispo , Coimbra , Portugal
5. Department of Management, Faculty of Economics and Management , Czech University of Life Sciences Prague , Prague , Czech Republic