K. Ibrahim, Hassan., and Rusel D . Salem. “Optical Properties 0f Poly Vinyl Alcohol ( PVA) Doped With Ali Zarin Orange Azo Dye Thin Films Prepared by Cast Method”. Journal of Kufa-Physics, vol. 4, no. 1, June 2012, https://journal.uokufa.edu.iq/index.php/jkp/article/view/7560.