1. A. Grzeszak, Tape world. Polityka 48(2935), 48 (2013). (in Polish)
2. J. Szkoda, Diagnosing the states of the qualitative capacity of the production process. Diagnostyka 27, 89–94 (2002). (in Polish)
3. Institut fur Werkstofftechnic, Economic consequences of distortion. Report, Institut fur Werkstofftechnic, Bremen (1995)
4. P. Kula, Surface Layer Engineering (Lodz University of Technology, Lodz, 2000). (in Polish)
5. A. Rakhit, Heat Treatment of Gears: A Practical Guide for Engineers (ASM International, Materials Park, 2000)