“INVESTIGATIONS INTO THE TRACTION MODES OF FREIGHT TRAINS UNDER FLUCTUATING ELECTRICITY TARIFFS”. Ta’limda Raqamli Texnologiyalarni Tadbiq Etishning Zamonaviy Tendensiyalari Va Rivojlanish Omillari, vol. 27, no. 1, Jan. 2024, pp. 83-91, http://pedagoglar.org/index.php/01/article/view/205.