Christophe, Chiza M., Omar F. Hamad, Libe V. Massawe, and Abdi T. Abdalla. “Mixed Mode Device-to-Device Communication Scheme for Congestion Reduction and Channel Usage Optimization in 5G Cellular Networks”. Tanzania Journal of Science 45, no. 3 (March 8, 2021): 405–416. Accessed May 6, 2024. https://tjs.udsm.ac.tz/index.php/tjs/article/view/206.