FRYCA-KNOP, J.; MAJECKA, B. Ethics of the professional drivers. Case study of public transport. Transport Economics and Logistics, [S. l.], v. 77, p. 7–17, 2018. DOI: 10.26881/etil.2018.77.01. Disponível em: https://czasopisma.bg.ug.edu.pl/index.php/znetil/article/view/2734. Acesso em: 2 dec. 2022.