Smitthipong, W. ., . R. . Chollakup, W. . Kongtad, and . F. . Delor-Jestin. “Effect of Palm Fiber on Photo and Thermo-Degradation of Polyethylene Composites”. Agriculture and Natural Resources, vol. 48, no. 6, Dec. 2014, pp. 908-15, https://li01.tci-thaijo.org/index.php/anres/article/view/243487.