K. S. Al salhen, O. E. I. Omar, and L. A. Aljradmi, “A Biochemical Study of α-Amylase Activity in Saliva of Some Libyan Ciga-rette Smokers”, mjsc, vol. 35, no. 3, pp. 199–208, Dec. 2020, doi: 10.54172/mjsc.v35i3.295.