H. Eddan, Hazim, et al. “Evaluation of Alpha- Amylase Activity in Serum and Saliva of Normal Individuals and Patients With Jaundice”. Tikrit Journal of Pharmaceutical Sciences, vol. 1, no. 1, Mar. 2023, pp. 50-57, doi:10.25130/tjphs.2005.1.6.50.57.