Birkeland, Mikkel Egede, Camilla Riff Brems, and Tomas Kabelmann. “Analyse Af Personers Transportarbejde, 1975-1998”. Proceedings from the Annual Transport Conference at Aalborg University 7, no. 1 (December 31, 2000). Accessed April 28, 2024. https://journals.aau.dk/index.php/td/article/view/4893.