"It's all we got left". Why poor smokers are less sensitive to cigarette price increases.
Int J Environ Res Public Health. 2009 Feb;6(2):608-21. doi: 10.3390/ijerph6020608. Epub 2009 Feb 10.
Int J Environ Res Public Health. 2009.
PMID: 19440404
Free PMC article.