Safaa Abdul-Jaleel, Noor. “Design LQR Controller for Higher Order Systems Based on the Reduction Model”. Journal of Engineering and Sustainable Development 19, no. 2 (March 1, 2015): 42–57. Accessed May 6, 2025. https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/804.