NIELSEN, B. M. Jernbanesikkerhed, mest mulig jernbanesikkerhed for pengene. Proceedings from the Annual Transport Conference at Aalborg University, [S. l.], v. 9, n. 1, 2002. DOI: 10.54337/ojs.td.v9i1.6143. Disponível em: https://journals.aau.dk/index.php/td/article/view/6143. Acesso em: 5 may. 2024.