EGBULA, F. U. Network Management Protocols In International Telephone Calls: A Review. International Journal of Creativity and Technical Development (IJCTD), [S. l.], v. 1, n. 1-3, p. 123–138, 2009. Disponível em: http://icidr.org.ng/index.php/Ijctd/article/view/693. Acesso em: 19 sep. 2024.