Sh.I., M., T. T.M., N. J.H, and S. Toshtemirov. “Determining the Interaction Coefficient Between Wheels and Rails”. American Journal of Engineering , Mechanics and Architecture (2993-2637), vol. 2, no. 3, Mar. 2024, pp. 65-67, http://grnjournal.us/index.php/AJEMA/article/view/3703.