Hammid, A. T., M. Hojabri, M. H. Sulaiman, A. N. Abdalla, and A. A. Kadhim. “Load Frequency Control for Hydropower Plants Using PID Controller”. Journal of Telecommunication, Electronic and Computer Engineering (JTEC), vol. 8, no. 10, Dec. 2016, pp. 47-51, https://jtec.utem.edu.my/jtec/article/view/1370.