Ajiya, Dahiru Adamu, et al. “The Influence of Glycerol on Mechanical, Thermal and Morphological Properties of Thermoplastic Tapioca Starch Film”. Journal of Science and Technology, vol. 9, no. 4, Dec. 2017, https://penerbit.uthm.edu.my/ojs/index.php/JST/article/view/2054.