Jameel Kadhum Abed, Muhannad Jabbar Munati, and Bassam Mohammed Yaseen. “Single Phase Cascaded H-Bridge Multilevel Inverter Study and Comparison of Different Levels”. Journal of Madenat Alelem University College, Vol. 10, no. 1, June 2018, pp. 56-70, https://journal.mauc.edu.iq/index.php/JMAUC/article/view/54.