Khromova, G. ., I. . Kamalov, and S. . Omonov. “MODERNIZATION OF THE DESIGN OF THE COIL SPRING OF THE AXLE SUSPENSION OF HIGH-SPEED ELECTRIC TRAINS”. Eurasian Journal of Academic Research, vol. 5, no. 1, Jan. 2025, pp. 165-9, https://in-academy.uz/index.php/ejar/article/view/44137.