“Photochemical Study of Different Thicknesses of Polystyrene Films Containing Ni(II) Complex against photodegradation”, ANJS, vol. 22, no. 4, pp. 30–41, Dec. 2019, Accessed: Jul. 03, 2024. [Online]. Available: https://anjs.edu.iq/index.php/anjs/article/view/2208