Sheikh, Aabid Hussain, and Farhad Ilahi Bakhsh. “Optimal Power Flow Through Variable Frequency Transformer Using Different Optimization Techniques”. Distributed Generation & Alternative Energy Journal 37, no. 4 (April 25, 2022): 1129–1158. Accessed June 3, 2026. https://journals.riverpublishers.com/index.php/DGAEJ/article/view/15253.