Purwoharjono, Purwoharjono, Rudy Gianto, and Zainal Abidin. “Modal Analysis Method to Determine Voltage Stability in Electric Power Systems”. Journal of Advanced Research in Applied Mechanics 144, no. 1 (December 10, 2025): 72–83. Accessed December 12, 2025. https://semarakilmujournal.com.my/index.php/aram/article/view/141.