Ibrahim, Salam A.R., Ra’ad Saied Al-Rawie, and Ibrahim R. Agool. 2017. “Optical Properties of Obliquely Evaporated Manganese Films”. Ibn AL-Haitham Journal For Pure and Applied Sciences 27 (1): 129-36. https://jih.uobaghdad.edu.iq/index.php/j/article/view/370.