Uduak A. Umoh, et al. “Uncertainty and Congestion Elimination in 4G Network Call Admission Control Using Interval Type-2 Intuitionistic Fuzzy Logic”. Global Journal of Computer Science and Technology, vol. 20, no. D1, Jan. 2020, pp. 35-50, https://computerresearch.org/index.php/computer/article/view/1942.