“Photostability of PMMA-TiO2 micro composites and PMMA-TiO2 nano composites”, IJP, vol. 7, no. 8, pp. 6–10, Dec. 2009, Accessed: May 17, 2024. [Online]. Available: https://ijp.uobaghdad.edu.iq/index.php/physics/article/view/906