Шохижахон, К. “: Kudratov Shohijaxon Ixtiyorovich Toshkent Davlat Transport Universiteti ”Lokomotivlar Va Lokomotiv xo’jaligi” Kafedrasi Tayanch Doktoranti”. Scientific and Technical Journal of Namangan Institute of Engineering and Technology, vol. 8, no. 1, Mar. 2023, pp. 141-5, http://niet.uz/index.php/nj/article/view/3.