Mohd Yazed, Muhammad Syukri, Ariff Farhan Zainodin, and Farhanahani Mahmud. 2017. “Fuzzy Logic System for Menstrual Cycle Interpretation Based on BBT Data”. International Journal of Integrated Engineering 9 (4). https://penerbit.uthm.edu.my/ojs/index.php/ijie/article/view/2082.