WULGARIS, P.; WOJEWÓDZKA-KRÓL, K. Infrastructure and safety in the Polish railway transport. Transport Economics and Logistics, [S. l.], v. 77, p. 131–142, 2018. DOI: 10.26881/etil.2018.77.13. Disponível em: https://czasopisma.bg.ug.edu.pl/index.php/znetil/article/view/2746. Acesso em: 5 dec. 2022.