Z. A. A. Muhasain and S. A. A. Muhasain, “Analysis and Design of Controller for Level Process Control without Sensor”, NUCEJ, vol. 13, no. 1, pp. 84–97, Mar. 2010, Accessed: Dec. 23, 2024. [Online]. Available: https://oldjournal.eng.nahrainuniv.edu.iq/index.php/main/article/view/582