Okwu, H. N., and F. E. Onuodu. “An Improved 5g Wireless Propagation Model Using 3-D Ray-Tracing Technique”. Rivers State Univeristy Journal of Biology & Applied Sciences, vol. 1, no. 2, Oct. 2022, https://jbasjournals.com/index.php/rsujbas/article/view/9.