Doaa Hashim Osmana, Khalid Hamed Belal, and Ibrahim Elemam Abdallah,. “Quality of Service Analysis of 3G and 4G Networks”. Technology Horizon Journal (ISSN: 1858-6368), vol. 2, no. 3, Mar. 2018, pp. 53-56, https://thj.fu.edu.sd/index.php/thj/article/view/42.