D. I. Moubarak, et al. “Agricultural and High-Density Polyethylene (HDPE) Waste Recycling to Produce High Voltage Insulator for Covered Conductor (CC) Distribution Systems”. International Journal of Integrated Engineering, vol. 17, no. 5, Aug. 2025, pp. 41-52, https://penerbit.uthm.edu.my/ojs/index.php/ijie/article/view/18026.