Hong, Kwang Hyok, and Sin Kwang Kim. “Optimal IMC-PID Controller Incorporating Predictive Functional Control Structure and Disturbance Observer”. International Journal of Recent Advances in Multidisciplinary Topics, vol. 6, no. 9, Sept. 2025, pp. 62-67, https://journals.ijramt.com/index.php/ijramt/article/view/3125.