Razgonov, O. P., Adreevskykh, O. V., Bondarenko, B. M. and Bezrukavyi, D. O. (2007) “TO ESTIMATE THE FRICTIONAL FORCES AT THE POINTS OF START AND STOP OF THE ARMATURE OF THE RELAY”, Science and Transport Progress , (14), pp. 12–15. doi: 10.15802/stp2007/17759.