Eaton, David, Seyyit Umit Dikmen, and Rıfat Akbiyikli. “Controlling the Cost of Risk Management by Utilising a Phase Portrait Methodology”. Transport 33, no. 2 (January 26, 2018): 315–321. Accessed November 23, 2024. https://tede.vgtu.lt/index.php/Transport/article/view/173.