Nurbayeva А., Turdieva З., and Makysh М. “New Trends in the Development of Innovations in Railway Transport”. Economic series of the Bulletin of L.N. Gumilyov ENU, no. 1 (March 30, 2023): 172–184. Accessed January 21, 2026. https://bulecon.enu.kz/index.php/main/article/view/571.