Alfaifi, H. Y. ., M. M. . Alenezy, T. T. . Alenezy, F. N. . Alenazy, and A. M. . Aleneze. “Determination of Toxic Concentrations of Heavy Metals in Selected Samples of Tobacco Products”. Journal of Chemistry and Nutritional Biochemistry, vol. 3, no. 1, Aug. 2022, pp. 11-23, doi:10.48185/jcnb.v3i1.545.