N.A., Tarjudin, Sumpono I., and Sakrani S. “Optical Properties of Nanocrystalline Silicon Thin Films in Wider Regions of Wavelength”. Journal of Science and Technology 4, no. 1 (1). Accessed May 25, 2020. https://publisher.uthm.edu.my/ojs/index.php/JST/article/view/461.