N. A. Al-Assaf, “DETERMINATION OF SERUM TRACE ELEMENTSMAGNESIUM, COPPER, ZINC, AND SELENIUM IN ASTHMATIC PATIENTS BY ATOMIC ABSORPTION SPECTROPHOTOMETRY”, Al-Nahrain J. Sci., vol. 13, no. 1, pp. 20–25, Mar. 2010, Accessed: May 22, 2026. [Online]. Available: https://mail.anjs.edu.iq/index.php/anjs/article/view/1135