Shehu Yaro, Abdulmalik, and Ahmad Zuri Sha'ameri. “Development of an Association Technique for a 3-Dimensional Minimum Configuration Multilateration System”. International Journal of Integrated Engineering, vol. 12, no. 1, Jan. 2020, pp. 59-71, https://penerbit.uthm.edu.my/ojs/index.php/ijie/article/view/3421.