Preisner, Leszek, and Mariusz Trela. “Economic Instruments for the Internalization of External Costs of Road Transport”. Economic and Environmental Studies 13, no. 1 (25) (December 11, 2020): 61–72. Accessed November 5, 2024. https://czasopisma.uni.opole.pl/index.php/ees/article/view/3002.