Ali, Nihad K., and Ikhlas H. Sallal. “Synthesis, Optical Energy Gap and Gas Sensing Properties of TiO2 Doped Cr2O3 Thin Films”. Ibn AL-Haitham Journal For Pure and Applied Sciences 39, no. 1 (January 20, 2026): 177–184. Accessed June 25, 2026. https://www.jih.uobaghdad.edu.iq/index.php/j/article/view/4258.