1. Mortality from smoking in developed countries 1950–2000;Peto,1994
2. The global burden of disease in 1990;Murray;Bull World Health Org,1994
3. Cigarette consumption in rural China;Hu;Am J Public Health,2000
4. Smoking in China;Yang;JAMA,1999
5. Special topics, Report No. 11, Social data collected by the General Household Survey. Census and Statistics Department, Hong Kong, 1993