Mohammad Adil , Razooqi, and Majeed Zuhair N. “Copper Effect on the Structural and Optical Properties Affecting the Gas Sensitivity of Titanium Oxide Nanofilms”. History of Medicine 9, no. 1 (February 28, 2023). Accessed August 9, 2025. https://historymedjournal.com/HOM/index.php/medicine/article/view/832.