Nafasov J.H , Sh.Kh. Toshtemirov , Mamaev Sh.I , Tursunov T.M ,. 2024. “Determining the Interaction Coefficient Between Wheels and Rails”. American Journal of Engineering , Mechanics and Architecture (2993-2637) 2 (3):55-57. http://grnjournal.us/index.php/AJEMA/article/view/3687.