Alden, Feras Zen, Suhaidi Hassan, and Adib Habbal. 2018. “Improving Network Performance by Enabling Device-to-Device Communication over Heterogeneous Networks”. Journal of Telecommunication, Electronic and Computer Engineering (JTEC) 10 (2-4):167-71. https://jtec.utem.edu.my/jtec/article/view/4337.