Christensen, Annette, and Mette Bøgelund. “Udfordringer I Transportsektoren Frem Mod år 2050”. Proceedings from the Annual Transport Conference at Aalborg University 17, no. 1 (December 31, 2010). Accessed April 29, 2024. https://journals.aau.dk/index.php/td/article/view/5524.