1. Faculty of Manufacturing Technologies, Technical University of Košice with a Seat in Prešov, Bayerova 1, 080 01 Prešov, Slovakia
2. Faculty of Mechanical Engineering, Technical University of Kosice, Letna 9, 042 00 Kosice, Slovakia
3. Faculty of Mechanical Engineering, VSB-Technical University of Ostrava, 17. Listopadu 2172/15, 80700 Ostrava-Poruba, Czech Republic
4. Faculty of Mining, Ecology, Process Control and Geotechnology, Technical University of Kosice, Park Komenskeho 14, 042 00 Kosice, Slovakia