T. V. Omotosho, D. T. Abiodun, S. A. Akinwumi, C. Ozonva, G. Adeyinka, and L. N. Obafemi, “Design and Construction of a Pure Sine Wave Inverter”, Jour. Inform. Math. Sci., vol. 9, no. 2, pp. 397–404, Aug. 2017.