Khalil Ismaiel, D., and Dawser. “Effects of Zinc and Allopurinol in Ameliorating Oxidative Stress in Lead-Exposed Workers”. Iraqi Journal of Pharmacy, vol. 5, no. 1, Dec. 2005, pp. 1-5, https://rjps.uomosul.edu.iq/index.php/iphr/article/view/21636.