Mohammed, Wlla M. “Improvement the Efficiency of SnO2 N-Si Detector by Engraving Method Using a CNC Machine”. Iraqi Journal of Physics 17, no. 41 (May 29, 2019): 51–57. Accessed May 2, 2025. https://www.ijp.uobaghdad.edu.iq/index.php/physics/article/view/458.