1. Smil V (2005) Creating the twentieth century: technical innovations of 1867–1914 and their lasting impact. Oxford University Press, Oxford
2. Virgala I, Kelemen M (2013) Experimental friction identification of a dc motor. Int J Mech Appl 3(1):26–30
3. Kara T, Eker I (2004) Nonlinear modeling and identification of a dc motor for bidirectional operation with real time experiments. Energy Convers Manage 45(7–8):1087–1106
4. Schoukens J, Ljung L (2019) Nonlinear system identification: a user-oriented road map. IEEE Control Syst Mag 39(6):28–99
5. Budai C, Kova’cs LL (2017) On the stability of digital position control with viscous damping and coulomb friction. Periodica Polytech Mech Eng 61(4):266–271