Rao, Ch.N. Narasimha, et al. “Torque Ripple Reduction in Brushless DC Motor by Using SPWM and SVPWM Techniques”. International Journal of Engineering & Technology, vol. 7, no. 4.24, Nov. 2018, pp. 71-75, https://doi.org/10.14419/ijet.v7i4.24.21858.