SURYAWANSHI, Amit; BHATI, Monika; DUBEY, Rupesh. Session Initiation Protocol (SIP). International Journal of Computer Sciences and Engineering, [S. l.], v. 1, n. 3, p. 18–21, 2013. Disponível em: https://ijcse.isroset.org/index.php/j/article/view/13. Acesso em: 2 feb. 2026.