Nielsen, Gustav. «Virkemidler Og Styringsformer I Lokal Transportpolitikk, En Komparativ Studie». Proceedings from the Annual Transport Conference at Aalborg University 3, no. 1 (diciembre 31, 1996). Accedido mayo 19, 2024. https://journals.aau.dk/index.php/td/article/view/3908.