“Substrate Temperature Effect on the Structure, Morphological and Optical Properties of CuO Sapphire Thin Films Prepared by Pulsed Laser Deposition”. Ibn AL-Haitham Journal For Pure and Applied Sciences, vol. 27, no. 2, Apr. 2017, pp. 78-86, https://jih.uobaghdad.edu.iq/index.php/j/article/view/330.