Nasser B. Alsammak, Ahmed, Suhib Fekry Hamid, and Khalid Tourkey Atta. “Using Solar Photovoltaic Systems, Battery Energy Storage Systems, and Underfrequency Load-Shedding to Improve the Frequency Stability of Power Systems”. Al-Rafidain Engineering Journal (AREJ) 28, no. 1 (March 1, 2023): 165–172. Accessed September 7, 2025. https://jamh.uomosul.edu.iq/index.php/arej/article/view/30844.