Al-Sulaimawi, Itab F. H. “Optical Properties of PVA K2CrO4 Composite”.
Ibn AL-Haitham Journal For Pure and Applied Sciences
, vol. 28, no. 2, Mar. 2017, pp. 32-40,
https://jih.uobaghdad.edu.iq/index.php/j/article/view/174
.