1. VSB - Technical University of Ostrava, Department of Production Machines and Design, Ostrava, Czech Republic, EU, lukas.kudrna@vsb.cz
2. VSB - Technical University of Ostrava, Department of Material Engineering, Ostrava, Czech Republic, EU, petra.vanova@vsb.cz
3. VSB - Technical University of Ostrava, Department of Material Engineering, Ostrava, Czech Republic, EU, jitka.malcharczikova@vsb.cz
4. VSB - Technical University of Ostrava, Department of Production Machines and Design, Ostrava, Czech Republic, EU, tomas.kubin@vsb.cz