1. Framework convention on tobacco control;World Health Organization,2003
2. Government leadership in tobacco control: Brazil’s experience;Goldfarb,2003
3. Effect of smoke-free workplaces on smoking behaviour: systematic review;Fichtenberg;BMJ,2002
4. California Environmental Protection Agency, Proposed identification of environmental tobacco smoke as a toxic air contaminant, 2005.
5. U.S. Department of Health and Human Services, The health consequences of involuntary exposure to tobacco smoke: a report of the surgeon general, 2006.