1. ASH. The safer cigarette: What the tobacco industry could do … and why it hasn't done it. A survey of 25 years of patents for innovations to reduce toxic and carcinogenic chemicals in tobacco smoke. London: Action on Smoking and Health/Imperial Research Fund; 1999.
2. Baillie AJ, Mattick RP, Hall W. Quitting smoking: estimation by meta-analysis of the rate of unaided smoking cessation. Austr Journ of Publ Health 1995; 19: 129–131.
3. Bates C, Connolly GN, Jarvis M. Tobacco additives. Cigarette engineering and nicotine addiction. A survey of the additive technology used by cigarette manufacturers to enhance the appeal and addictive nature of their product. London: ASH/Imperial Research Fund; 1999.
4. Benowitz NL. Nicotine safety and toxicity. New York: Oxford university press; 1998.
5. Benowitz NL. Nicotine addiction. Primary Care 1999; 26: 611–631.