1. Disparities in Smoke-Free Workplace Policies Among Food Service Workers
2. Burns D, Warner KE. Smokers who have not quit: is cessation more difficult and should we change our strategies? Burns D, editor. In: Those who continue to smoke: is achieving abstinence harder and do we need to change our interventions? Smoking and Tobacco Control Monograph No. 15, USDHHS, NIH, NCI, NIH Pub. No. 03–5370, pp. 11–31, 2003 [accessed 6 July 2013]. Available from: http://cancercontrol.cancer.gov/brp/tcrb/monographs/15/monograph15-chapter1.pdf
3. Hardening and the hard-core smoker: concepts, evidence, and implications