Szymanowski, Wacław. «The European Union Transport Policy and Their Consequences for the Infrastructure Development in Poland in 2014-2020. Part 1». Olsztyn Economic Journal 9, no. 4 (diciembre 30, 2014): 321–332. Accedido octubre 2, 2024. https://czasopisma.uwm.edu.pl/index.php/oej/article/view/3184.