Marian Dudziak

Poznan University of Technology, Chair of Basics of Machine Design, 60-365 Poznań, ul. Piotrowo 3, Poland

Andrzej Lewandowski

Jan Sehn Institute of Forensic Research in Kraków, 31-033 Kraków, ul. Westerplatte 9, Poland

Michał Śledziński

Poznan University of Technology, Chair of Basics of Machine Design, 60-365 Poznań, ul. Piotrowo 3, Poland