W. Widhiatmoko, H. Susilawati, and R. K. Noviandono, “Analisis Performansi VOIP (Voice Over Internet Protocol) Pada Jaringan Wimax (Worldwide Interoperability For Microwave Access) Di Wilayah DKI Jakarta”, INFOTEL, vol. 3, no. 1, pp. 58-72, May 2011.