D. . Halboot Mohussen, “Analog Speed-Control of DC-Motor Using Proportional and Proportional-Integral Controllers”, J. eng. sustain. dev., vol. 15, no. 3, pp. 205–224, Sep. 2011, Accessed: Apr. 26, 2025. [Online]. Available: https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/1369