Abu Mansor, Mohamad Luqman Harith, et al. “Rheological and Thermodynamic Behaviour of PSf ZnO: Effect of Zinc Oxide”. International Journal of Integrated Engineering, vol. 11, no. 5, Sept. 2019, pp. 119-25, https://penerbit.uthm.edu.my/ojs/index.php/ijie/article/view/3958.