ZEITLER, Ulli. Traffic separation, safety and ethics. Artikler fra Trafikdage på Aalborg Universitet, [S. l.], v. 3, n. 1, 1996. DOI: 10.5278/ojs.td.v3i1.3989. Disponível em: https://journals.aau.dk/index.php/td/article/view/3989. Acesso em: 19 maj. 2024.