1. The Scientific Basis of Tobacco Product Regulation: Second Report of a WHO Study Group;WHO,2008
2. Standard Operating Procedure for Intense Smoking of Cigarettes;WHO,2012
3. Determination of “Tar”, Nicotine and Carbon Monoxide in Mainstream Tobacco Smoke;Health Canada,1999
4. Routine Analytical Cigarette-smoking Machine – Definitions and Standard Conditions;ISO,2000