Hidayat, Taufik, Rahutomo Mahardiko, and Mudrik Alaydrus. “Mobile Cellular Technology Forecast for the Indonesian Telecommunications Industry”. Journal of Telecommunications and the Digital Economy 8, no. 1 (March 31, 2020): 37–48. Accessed April 18, 2024. https://jtde.telsoc.org/index.php/jtde/article/view/226.