Rahnev, Mariyan. “TRANSPORTATION SYSTEMS MODELLING: TRANSPORTATION SYSTEMS MODELLING”. JOURNAL SCIENTIFIC AND APPLIED RESEARCH 18, no. 1 (March 23, 2023): 28–40. Accessed November 25, 2024. https://jsar.ftn.shu.bg/ojs-3.3.0-7/index.php/jsar/article/view/277.