Bobaxonov Mashxurbek Maqsud ugli. “[1] Esveld, C. (2001). Modern Railway Track (2nd ed.). MRT Productions. ISBN: 978-90-800324-3-3. [2] Lichtberger, B. (2011). Track Compendium: Formation, Permanent Way, Maintenance, Economics (2nd ed.). Eurailpress (DVV Media Group). ISBN: 978-3-7771-0400”. International Multidisciplinary Journal for Research & Development 13, no. 4 (April 22, 2026): 1712–1720. Accessed June 27, 2026. https://ijmrd.in/index.php/imjrd/article/view/5912.