1. Wilder Research Center. Homeless adults and children in Minnesota: statewide survey of people without permanent shelter. St. Paul, MN: Wilder Research Center; September 2004. https://www.wilder.org/Wilder-Research/Publications/Studies/Homelessness%20in%20Minnesota,%202003%20Study/Homeless%20Adults%20and%20Children%20in%20Minnesota%20-%20Statewide%20Survey%20of%20People%20Without%20Permanent%20Shelter.pdf . Accessed 18 July 2015.
2. Torchalla I, Strehlau V, Okoli CT, Li K, Schuetz C, Krausz M. Smoking and predictors of nicotine dependence in a homeless population. Nicotine Tob Res. 2011;13(10):934–42.
3. Chau S, Chin M, Chang J, Luecha A, Cheng E, Schlesinger J, et al. Cancer risk behaviors and screening rates among homeless adults in Los Angeles County. Cancer Epidemiol Biomarkers Prev. 2002;11(5):431–8.
4. Burt MR, Aron LY, Douglas T, Valente J, Lee E, Iwen B; the Urban Institute. Homelessness: programs and the people they serve. Findings of the National Survey of Homeless Assistance Providers and Clients. Washington, DC: U.S. Department of Housing and Urban Development; December 1999. https://www.hudexchange.info/resources/documents/HomelessProgramsPeople.pdf . Accessed 18 July 2015.
5. Connor SE, Cook RL, Herbert MI, Neal SM, Williams JT. Smoking cessation in a homeless population: there is a will, but is there a way? J Gen Intern Med. 2002;17(5):369–72.