Rao, M.Subba, P.V.S. Sobhan, and Shaik Naseer Ahammad. “Railway Traction System Based on Power Electronic Transformer”. International Journal of Engineering and Technology 7, no. 4.18 (November 27, 2018): 461–464. Accessed August 17, 2025. https://mail.sciencepubco.com/index.php/IJET/article/view/22984.