“Graphite Carbon With a Nanofiber Structure Derived from Oil Palm Fiber Biomass for Active Material for Supercapacitor Cells”. Indian Journal of Pure & Applied Physics (IJPAP) 62, no. 6 (May 27, 2024): 510–516. Accessed May 14, 2026. https://or.niscpr.res.in/index.php/IJPAP/article/view/6344.