1. United States Department of Housing and Urban Development (HUD). Homelessness Assistance. https://portal.hud.gov/hudportal/HUD?src=/program_offices/comm_planning/homeless (accessed Aug 13, 2017).
2. Prevalence and risk of homelessness among US veterans;Fargo;Prev Chronic Dis,2012
3. The age structure of contemporary homelessness: evidence and implications for public policy;Culhane;Anal Soc Issues Public Policy,2013
4. Factors associated with the health care utilization of homeless persons;Kushel;JAMA,2001