O, Patrick U, Nura Y, and Abubakar A.S. “Development of an Optimal Frequency and Terminal Voltage Control of Two- Source Two-Area System Using Optimized Pid Controller”. Journal of Materials Engineering, Structures and Computation 2, no. 3 (September 4, 2023). Accessed November 23, 2024. https://journals.nipes.org/index.php/jmsc/article/view/683.