1. Morbidity and Mortality Weekly Reports Atlanta;T Singh,2016
2. Food and Drug Administration UDoHaHS. Family Smoking and Tobacco Control Act http://www.fda.gov/TobaccoProducts/GuidanceComplianceRegulatoryInformation/ucm237092.htm2009.
3. Food and Drug Administration UDoHaHS. Deeming Tobacco Products to be Subject to the Federal Food, Drug and Cosmetic Act, as Amended by the Family Smoking Prevention and Tobacco Control Act. http:/www.fda.gov/tobaccoproducts/labeling/rulesregulationsguidance/ucm394909.htm2016.
4. Food and Drug Administration UDoHaHS. Deeming Tobacco Products to Be Subject to the Federal Food, Drug and Cosmetic Act, as Amended by the Family Smoking Prevention and Tobacco Control Act; Restrictions on the Sale and Distribution of Tobacco Products and Required Warning Statements for Tobacco Products https://www.federalregister.gov/articles/2016/05/2016-10658/deeming-tobacco-produicts-to-be-subject-to-the-federal-food-drug-and-cosmetic-act-as-amended-by-the2016.
5. How a cigarette is smoked determines blood nicotine levels;RI Herning;Clin Pharmacol Ther,1983