M A, Zulhakimie, et al. “Dynamic Mechanical Analysis of Bio-Based and Synthetic Petroleum Based Polymer Foams With Powder Type Organic Filler at Prolonged Ultra-Violet Exposure”. Emerging Advances in Integrated Technology, vol. 1, no. 1, Dec. 2020, pp. 45-57, https://penerbit.uthm.edu.my/ojs/index.php/emait/article/view/6991.