Ezzat, D. M. ., and A. I. . Salih. “Analysing the Color Properties of Sol-Gel Prepared Copper Oxide Thin Films”. Central Asian Journal of Theoretical and Applied Science, vol. 6, no. 2, Feb. 2025, pp. 91-98, https://www.cajotas.casjournal.org/index.php/CAJOTAS/article/view/1541.