S. H. . Abdullah, H. R. . Humud, and F. I. . Mustafa, “DC Sputtering Deposition of Copper Oxide Thin Films Doped with Carbon for Efficient Solar Selective Absorbers”, Iraqi Journal of Science, vol. 63, no. 7, pp. 2924–2934, Jul. 2022, doi: 10.24996/ijs.2022.63.7.16.