Mohd-Rahim, F. A., C. Wang, H. Boussabaine, and H. Abdul-Rahman. “Risk Prevention and Deduction in Software Development Using Fuzzy Membership Function”. Malaysian Journal of Computer Science, vol. 28, no. 3, Sept. 2015, pp. 221-4, https://jpmm.um.edu.my/index.php/MJCS/article/view/6864.