Muhamad’, M. R., Khedr M. Abo-Hassan, and S. Radhakrishna. “Determination of the Optical Constants of Zinc Sulphide”. Malaysian Journal of Science 17, no. 2 (April 25, 1996): 125–128. Accessed May 18, 2024. https://mjs.um.edu.my/index.php/MJS/article/view/9418.