Klinklai, Warunee. “Preparation and (Li⁺) Conductivity of Highly Deproteinized Natural Rubber Having Epoxy Group”. Frontiers in Engineering Innovation Research 5 (June 30, 2005): 70–75. accessed January 7, 2026. https://ph01.tci-thaijo.org/index.php/jermutt/article/view/242329.