Razgonov, O. P., O. V. Adreevskykh, B. M. Bondarenko, and D. O. Bezrukavyi. “TO ESTIMATE THE FRICTIONAL FORCES AT THE POINTS OF START AND STOP OF THE ARMATURE OF THE RELAY”. Science and Transport Progress , no. 14 (February 25, 2007): 12–15. Accessed November 23, 2024. https://stp.ust.edu.ua/article/view/17759.