NIELSEN, O. A. .; RØRBECH, J. Den fremtidige trafikudvikling i Danmark. Proceedings from the Annual Transport Conference at Aalborg University, [S. l.], v. 13, n. 1, 2006. DOI: 10.5278/ojs.td.v13i1.5238. Disponível em: https://journals.aau.dk/index.php/td/article/view/5238. Acesso em: 4 may. 2024.