Qaddus, Ahmed, Shahzad Hassan, and Abid Ali Minhas. “An Efficient Radio Frequency Channel Distribution in 5g Heterogeneous Cellular Networks for Avoiding Cross-Tier Interference in Macro and Small Cells”. Electrical, Control and Communication Engineering 14, no. 1 (July 1, 2018): 30–38. Accessed November 5, 2024. https://ecce-journals.rtu.lv/ecce/article/view/ecce-2018-0004.