TIETZE, Wolf; STEINMANN-TIETZE, Marie-Luise. Tasks Facing European Transport Policy in the 21st Century. Promet - Traffic&Transportation, [S. l.], v. 13, n. 2-3, p. 65–75, 2012. Disponível em: https://traffic2.fpz.hr/index.php/PROMTT/article/view/1941. Acesso em: 27 aug. 2025.