Oleg S. Ablyalimov, et al. “About the Difficulty of the Path Profile of the Marokand – Kattakurgan Section of the Uzbek Railway”. Excellencia: International Multi-Disciplinary Journal of Education (2994-9521), vol. 2, no. 6, June 2024, pp. 1236-40, https://doi.org/10.5281/.