I. A. JABBAR, A.; M. ALI, D. A Simulation Study of Tunneled Voice over Internet Protocol System. Al-Rafidain Engineering Journal (AREJ), [S. l.], v. 16, n. 3, p. 25–38, 2008. DOI: 10.33899/rengj.2008.44619. Disponível em: https://jamh.uomosul.edu.iq/index.php/arej/article/view/31302. Acesso em: 5 sep. 2025.