1. Faculty of Mechanical Engineering, Kazimierz Pulaski University of Technology and Humanities in Radom, Radom, Poland
2. Department of Physics, Kazimierz Pulaski University of Technology and Humanities in Radom, Radom, Poland
3. Forge Division, CELSA Huta Ostrowiec Sp. z o.o., Ostrowiec Świętokrzyski, Poland