Hairi, Mohd Hendra, Muhammad Nizam Kamarudin, Lee Qui Fang, Ahmad Sadhiqin Mohd Isira, and Mohamed Fauzi Packeer Mohamed. “Dual-Slope Percentage Bias Differential Relay (87) Protection Strategy for 11kV Underground Power Cable”. International Journal of Electrical Engineering and Applied Sciences (IJEEAS) 3, no. 1 (April 30, 2020). Accessed October 7, 2022. https://ijeeas.utem.edu.my/ijeeas/article/view/5778.