SZYMANEK, Andrzej. Conception of "4 goals and 3 levels" in risk management in road transport systems. Archives of Transport, Warsaw, Poland, v. 22, n. 3, p. 359–375, 2010. DOI: 10.2478/v10174-010-0022-1. Disponível em: https://archivesoftransport.com/index.php/aot/article/view/94.. Acesso em: 22 jul. 2024.