K. Antar, Rakan, and Ahmed A. Allu. “Design and Modeling of Speed Sensorless Control of DC Motor Drive System”. Al-Rafidain Engineering Journal (AREJ) 22, no. 5 (December 28, 2014): 238–249. Accessed August 8, 2025. https://ojs.uomosul.edu.iq/index.php/arej/article/view/27280.