ZAHARY, Ammar Thabet. Study of Voice-over-IP (VoIP) Telecom Companies and their Chances to Success in Arab Society Case Study: Yemeni Society. Journal of Science and Technology, [S. l.], v. 16, n. 1, 2014. DOI: 10.20428/jst.v16i1.90. Disponível em: https://journals.ust.edu/index.php/JST/article/view/90. Acesso em: 13 jan. 2025.