Rahim, N. A. A., R. Ranom, and H. Zainuddin. “Mathematical Modelling of Surface Discharge on the Contaminated Surface of Insulator Using Nernst’s Planck Equation”. Journal of Telecommunication, Electronic and Computer Engineering (JTEC), vol. 10, no. 2-2, May 2018, pp. 5-10, https://jtec.utem.edu.my/jtec/article/view/3950.