Dyr, Tadeusz, Karolina Ziółkowska, Agata Jaździk-Osmólska, and Małgorzata Kozłowska. “Economic Safety Aspects of the Road Traffic in Poland”. Central European Review of Economics & Finance 21, no. 5 (October 31, 2017): 7–23. Accessed March 26, 2023. http://economic-research.pl/Journals/index.php/ceref/article/view/607.