Halim, I., M. S. Syed Mohamed, L. S. Jin, and A. H. Azani. “Design of Noise Insulator for Metal Stamping Operation in Manufacturing Sector”. International Journal of Integrated Engineering, Vol. 11, no. 8, Dec. 2019, pp. 19-24, https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/2906.