Mohanad Qader Kareem, Suzan Abd-allah Hassan, and Maad Mohammed Ameen, “Doping Effect ((COCl2.6H2O) & (CuCl2.6H2O))(2%)w/v on Optical Energy gap of (GA/PVA) composite films”, Tikrit J. Pure Sci., vol. 20, no. 4, pp. 114–119, Feb. 2023.