Homkhiew, Chatree, and Thanate Ratanawilai. “Optimal proportions of composites from polypropylene and rubberwood flour after water immersion using experimental design”. Asia-Pacific Journal of Science and Technology 19, no. 6 (April 13, 2017): 780–793. accessed April 22, 2026. https://so01.tci-thaijo.org/index.php/APST/article/view/83057.