Monchuk DC, Rousu MC, Shogren JF, Nonnemaker J, Kosa KM. Decomposing the value of cigarettes using experimental auctions. Nicotine Tob Res. 2007 Jan;9(1):93-9.
Niaura R, Britt DM, Borrelli B, Shadel WG, Abrams DB, Goldstein MG. History and symptoms of depression among smokers during a self-initiated quit attempt. Nicotine Tob Res. 1999 Sep 1;1(3):251-7.