J. . Abdul-Kareem Mohammed, “A Novel Approach to Solving the OHESW Problem for Multilevel Inverters”, J. eng. sustain. dev., vol. 14, no. 4, pp. 167–182, Dec. 2010, Accessed: Jul. 04, 2025. [Online]. Available: https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/1427