A. F. Jaffar, “Optical Nonlinearity of Oxazine Dye Doped PMMA Films by Z-Scan Techniques”, Al-Nahrain J. Sci., vol. 15, no. 2, pp. 106–112, Sep. 2018, Accessed: May 22, 2026. [Online]. Available: https://anjs.edu.iq/index.php/anjs/article/view/1522