1 | University of Žilina, Faculty of Mechanical Engineering, Univerzitna 1, 010 26, Žilina, Slovakia |
2 | Lublin University of Technology, Faculty of Mechanical Engineering, ul. Nadbystrzycka Street 36, 20-618 Lublin, Poland |
3 | J.E.Purkyně Univerzity, Faculty of Production Technology and Management, Ústí nad Labem, Czech Republic |