“The Use of Combination of Clarithromycin -Nano Oxide Nanoparticles to Doping PVC to Protect It from Photodegradation”. Al-Nahrain Journal of Science, vol. 25, no. 4, Dec. 2022, pp. 11-15, https://mail.anjs.edu.iq/index.php/anjs/article/view/2538.