Mahmood SS. Characterization of (SnO2)1-x(TiO2:CuO)x films as NH3 gas sensor. IJP [Internet]. 2019 Jan. 5 [cited 2024 Dec. 19];16(39):71-80. Available from: https://ijp.uobaghdad.edu.iq/index.php/physics/article/view/105