S. Kumar Dash, B. Nayak, J. Ballav Sahu, and R. Rout, “Harmonic Elimination of Cascaded Multilevel Inverter using Metaheuristic Optimization Methods”, IJET, vol. 7, no. 4.15, pp. 272–276, Oct. 2018, doi: 10.14419/ijet.v7i4.15.23005.