محمود ا. ع., and حميد ر. “Biochemical Study of the Partially Purified Xanthine Oxidase from Sera of Patients With Vitamin D3 Deficiency”. INTERNATIONAL JOURNAL OF MEDICAL SCIENCES, vol. 7, no. 1, Jan. 2024, pp. 32-55, https://isnra.net/index.php/ijms/article/view/1080.