Petrenko, V. D., A. M. M. Alkhdour, A. L. Tiut’kin, and V. V. Kovalevich. “Research of Parameters of the Modernized Subgrade”. Science and Transport Progress , no. 41 (August 25, 2012): 164–169. Accessed November 9, 2024. https://stp.ust.edu.ua/article/view/8923.