A. Jalil, Mohd Hafiz, et al. “Back Calculation Anti Windup PID Controller on Several Well-Known Tuning Method for Glycerin Bleaching Process Temperature Regulation”. International Journal of Integrated Engineering, vol. 6, no. 3, Feb. 2015, https://penerbit.uthm.edu.my/ojs/index.php/ijie/article/view/1033.