Issmer, Ali Haneen. “A Correlation of Adenosine Deaminase Activity With Calcium Concentration in Sera of Renal Failure Patients”. University of Thi-Qar Journal, vol. 12, no. 4, Apr. 2019, pp. 1-13, https://www.jutq.utq.edu.iq/index.php/main/article/view/117.