1. The Health Consequences of Smoking: A Report of the Surgeon General,2004
2. Vital Signs: current cigarette smoking among adults aged ≥18 years -- United States, 2005-2010;MMWR Morb Mortal Wkly Rep,2011
3. Campaign for Tobacco-Free Kids. Cigarette tax increases by state per year 2000-2013. 2013; www.tobaccofreekids.org/research/factsheets/pdf/0275.pdf. Accessed May 15, 2015.
4. Cigarette Litter Abatement Fee Ordinance. City and County of San Francisco Ordinance. 173-09, 2009
5. Minnesota Budget Project. Revenue-raising options to help close Minnesota’s FY 2012-13 budget deficit. www.mnbudgetproject.org/research-analysis/minnesota-taxes/tax-proposals-policy-changes/revenue-raising-options-to-help-close-minnesota-s-fy-2012-13-budget-deficit. Accessed June 9, 2015.