1. Alcoholics Anonymous;Alcoholics Anonymous World Services,1939
2. Rat Park chronicle;Alexander;British Columbia Medical Journal,1980
3. Diagnostic and statistical manual of mental disorders;American Psychiatric Association,2000
4. Clinical pharmacology of nicotine: Implications for understanding, preventing, and treating tobacco addiction;Benowitz;Clinical Pharmacology and Therapeutics,2008
5. Statistical power analysis for the behavioural sciences;Cohen,1988