S. Al-Soffi, E., and H. Y. Al-Attar. “Estimation of ˜5 - Nucleotidase Activity and Alkaline Phosphatase in Serum of Pregnant Women With Some Bone Diseases”. Rafidain Journal of Science, vol. 18, no. 4, Aug. 2007, pp. 36-43, doi:10.33899/rjs.2007.42706.