Ying, Lee, R., Al-Amsyar S. Muhammad, Rusli N. Dini, Mohammad M. Rahman, Hasnita C. Harun, and Mat K. “Alkaline Pre-Treatment of Rice Hull and Coconut Hull Using Response Surface Methodology”. Journal of Tropical Resources and Sustainable Science (JTRSS) 9, no. 1 (August 22, 2021): 70–75. Accessed July 3, 2024. http://journal.umk.edu.my/index.php/jtrss/article/view/713.