Mahmood, Layth S., and Khalid Alzobai. “System Identification of 4*4 Multivariable Distillation Column”. Al-Nahrain Journal for Engineering Sciences 29, no. 3 (September 20, 2026): 501–507. Accessed October 10, 2026. https://old.nahje.com/index.php/main/article/view/1701.