Sunil Kumar, ahid, MD Mokaddam, Dr. Rashmi Agarwal. “Optimal Load Frequency Controller of Two Area Interconnected Power System Using Physical Constraints”. International Journal of Advanced Science and Technology, Vol. 29, no. 7s, June 2020, pp. 5802-11, http://sersc.org/journals/index.php/IJAST/article/view/26494.