FREES, Niels. CO2 reduktion i transportsektoren frem mod 2050. Proceedings from the Annual Transport Conference at Aalborg University, [S. l.], v. 18, n. 1, 2011. DOI: 10.54337/ojs.td.v18i1.5597. Disponível em: https://journals.aau.dk/index.php/td/article/view/5597. Acesso em: 6 dec. 2025.