Izadi Mood N, and Prasad k. “Role of Oxygen-Free Radicals on the Motility of Rat Ileum Effects of Xanthine Plus Xanthine Oxidase”. Acta Medica Iranica, Vol. 39, no. 2, 1, pp. 76-84, https://acta.tums.ac.ir/index.php/acta/article/view/2409.