Toral-Cruz, Homero, José Luis Vázquez-Ávila, Rafael Sánchez-Lara, Joel Antonio Trejo-Sánchez, and J.A. Alvarez-Chavez. “A Survey on Quality of Service in the Voice Over IP Technology”. European Scientific Journal, ESJ 14, no. 10 (September 19, 2018). Accessed March 29, 2024. https://eujournal.org/index.php/esj/article/view/11218.