I.Zorina, O, T V.Neskuba, O M.Mkrtychyan, and V A.Volokhov. “Benchmarking of the Transport Market With Hierarchical Clustering of Rail Companies”. International Journal of Engineering and Technology 7, no. 4.3 (September 15, 2018): 557–562. Accessed February 9, 2026. https://www.sciencepubco.com/index.php/IJET/article/view/19956.