VILHOF, Preben. Forsøg med forbedring og tilpasning af den kollektive trafik i byer. Proceedings from the Annual Transport Conference at Aalborg University, [S. l.], v. 1, n. 1, 1994. DOI: 10.5278/ojs.td.v1i1.3859. Disponível em: https://journals.aau.dk/index.php/td/article/view/3859. Acesso em: 10 may. 2024.