R. J. Satputaley, A. Khergade, and S. . Bodkhe. “Impact of Different Types of Voltage Sag on Adjustable Speed Drive”. Helix - The Scientific Explorer | Peer Reviewed Bimonthly International Journal, vol. 10, no. 01, Feb. 2020, pp. 245-9, https://helixscientific.pub/index.php/home/article/view/91.