Mulama, Austine A, Julius M Mwabora, Andrew O Oduor, and Cosmas M Muiva. 2018. “Compositional and Thickness Effects on the Optical Properties of Zinc–Doped Selenium–Antimony Thin Films”. Tanzania Journal of Science 44 (4):51-58. http://www.tjs.udsm.ac.tz/index.php/tjs/article/view/188.