Sultanbek М., N.D. Adilova, and A. Sladkowski. “Economic Benefits of Route Monitoring: GPS Tracking in Kazakhstan’s Railways”. Journal of Economic Research & Business Administration 2, no. 148 (June 25, 2024): 71–83. Accessed November 21, 2024. https://be.kaznu.kz/index.php/math/article/view/2778.