. Abass, A. K., and S. A. Abd Al-Hassan. “Preparation Composite Thin Films of Tin Oxide With Cobalt Oxide and Study Their Structure and Optical Characteristics ”. Al-Qadisiyah Journal of Pure Science, Vol. 24, no. 2, Oct. 2019, https://journalsc.qu.edu.iq/index.php/JOPS/article/view/959.