NORHEIM, B. Kollektivtransportens utvikling i Norge 1982-94. Proceedings from the Annual Transport Conference at Aalborg University, [S. l.], v. 4, n. 1, 1997. DOI: 10.5278/ojs.td.v4i1.4045. Disponível em: https://journals.aau.dk/index.php/td/article/view/4045. Acesso em: 27 apr. 2024.