Mohd Fisol, Aiman Naqib, et al. “Synthesis of Catalyst from Agricultural Wastes for Palm Oil Conversion into Biodiesel”. Multidisciplinary Applied Research and Innovation, vol. 7, no. 2, May 2026, pp. 28-33, https://publisher.uthm.edu.my/periodicals/index.php/mari/article/view/21602.