1. The Health Consequences of Smoking. A report of the Surgeon General;United States Department of Health and Human Services (USDHHS),2004
2. IARC Monographs on the evaluation of carcinogenic risks to humans. Vol. 83 Tobacco smoke and involuntary cigarette smoking;International Agency for Research on Cancer (IARC),2004
3. The changing cigarette, 1950–1995;Hoffmann;J Toxicol Environ Health,1997
4. Tobacco, colorectal cancer, and adenomas: a review of the evidence;Giovannucci;J Natl Cancer Inst,1996
5. Mortality from cancer in relation to smoking: 50 years observations on British doctors;Doll;Br J Cancer,2005