BENDEL, B.; SCHWENK, J.; MADSEN, T.; FEKETE, M. Applying DEFCON and the Homeland Security Advisory System in organisational risk management. Science International Empirical Review, [S. l.], v. 1, n. 1, p. 192–202, 2021. DOI: 10.52514/sier.v1i1.16. Disponível em: https://mail.sier-journal.com/index.php/SIER/article/view/16. Acesso em: 26 oct. 2025.