1. Faculty of Mining, Ecology, Process Control and Geotechnology, Technical University of Kosice, Kosice, Slovak Republic
2. Faculty of Mechanical Engineering, Technical University of Kosice, Kosice, Slovak Republic
3. Faculty of Logistics and Crisis Management, Tomas Bata University in Zlín, Zlín, Czech Republic
4. Department of Bachelor study, College of Logistics, Přerov, Czech Republic