Miskon, Mohamad Taib, et al. “Improving Coffee Roast Yield Consistency With Self-Tuned Fuzzy-PID Controller”. International Journal of Integrated Engineering, vol. 17, no. 2, Aug. 2025, pp. 301-14, https://penerbit.uthm.edu.my/ojs/index.php/ijie/article/view/21362.