Кryvoruchko, Oksana, Vladimir Shynkarenko, and Nadezhda Popova. “Quality Management of Transport Services: Concept, System Approach, Models of Implementation”.
International Journal of Engineering and Technology 7, no. 4.3 (September 15, 2018): 472–476. Accessed April 15, 2025.
https://sciencepubco.com/index.php/IJET/article/view/19919.