Chew, P. Y., A. H. You, T. R. Vijayaram, B. K. See, P. S. Lim, and M. C. Ng. “Preparation of Copper Lead Frame by Powder Metallurgy Technique”. Journal of Metals, Materials and Minerals, vol. 21, no. 2, Dec. 2011, http://jmmm.material.chula.ac.th/index.php/jmmm/article/view/186.