Seyedi, Masoumeh. “Frequency Control Enhancement in Multi Area Power Systems Using Demand Response and PI-Fuzzy Controller in the Presence of Renewable Energy Sources”. Intelligence Modeling in Electromechanical Systems 2, no. 2 (April 23, 2025): 84–93. Accessed February 25, 2026. https://www.imes.reapress.com/journal/article/view/41.