CASTELLUCCIO, Francesco; CATALANO, Mario; FICHERA, Davide; MIGLIORE, Marco; AMOROSO, Salvatore. Standardization of Road Danger Signs in the European Union. Promet - Traffic&Transportation, [S. l.], v. 27, n. 1, p. 1–11, 2015. DOI: 10.7307/ptt.v27i1.1504. Disponível em: https://traffic2.fpz.hr/index.php/PROMTT/article/view/2510. Acesso em: 26 aug. 2025.