K. Srujan, Dr. S. Shiva Prasad, and Vinod Kumar. “A Three Phase UPS Systems Operating Under Nonlinear Loads With Modified SPWM Controller”. International Journal of Advance Engineering and Research Development (IJAERD) 2, no. 9 (September 25, 2015): 70–76. Accessed July 6, 2025. https://ijaerd.org/index.php/IJAERD/article/view/1018.