Y. Z. Arief, N. A. Muhamad, M. H. I. Saad, S. Nazri, S. N. A. Othman, and M. F. H. Mohd Taib, “High Voltage Stress Distribution Phenomena on Liquid and Solid Insulation Material Using Finite Element Method”, JTEC, vol. 10, no. 1-12, pp. 113–117, Mar. 2018.