1. Faculty of Mechanical Engineering, Department of Technological Engineering, University of Zilina, Univerzitná 8215/1, 010 26 Žilina, Slovak Republic
2. Institute of Materials and Machine Mechanics, Slovak Academy of Sciences, Inoval - Innovation center, Priemyselná 525 Ladomerská Vieska, 965 01 Žiar nad Hronom, Slovak Republic