PITTELKOW, A.; LOHMANN-HANSEN, A. .; LAHRMANN, H.; KILDEBOGAARD, J.; NIELSEN, J. Workshop om roadpricing. Proceedings from the Annual Transport Conference at Aalborg University, [S. l.], v. 6, n. 1, 1999. DOI: 10.5278/ojs.td.v6i1.4489. Disponível em: https://journals.aau.dk/index.php/td/article/view/4489. Acesso em: 1 may. 2024.