Kamarudin, Noor Hasliza, et al. “Toughening of Ceramic Shell Mould With Rice Husk Fiber (CSm-RH) to Improve Strength Property and Mould Performance”. Emerging Advances in Integrated Technology, vol. 2, no. 2, Nov. 2021, pp. 43-49, https://penerbit.uthm.edu.my/ojs/index.php/emait/article/view/9791.