Abdul Latiff, Zukry, and Mohd Fairouz Mohd Yousof. “Development of Software for Duval Triangle and Pentagon Interpretation on Transformer Oil Dissolved Gas Analysis”. Evolution in Electrical and Electronic Engineering, vol. 2, no. 2, Nov. 2021, pp. 467-73, https://penerbit.uthm.edu.my/periodicals/index.php/eeee/article/view/4456.