Rao, M.Subba, P.V.S. Sobhan, and Shaik Naseer Ahammad. “Railway Traction System Based on Power Electronic Transformer”. International Journal of Engineering & Technology 7, no. 4.18 (November 27, 2018): 461–464. Accessed April 30, 2024. https://www.sciencepubco.com/index.php/ijet/article/view/22984.