Abd Halim, W., S. Ganeson, M. Azri, and T. Tengku Azam. “Review of Multilevel Inverter Topologies and Its Applications”. Journal of Telecommunication, Electronic and Computer Engineering (JTEC), vol. 8, no. 7, Oct. 2016, pp. 51-56, https://jtec.utem.edu.my/jtec/article/view/1278.