1. Ripping and running;Agar,1973
2. HIV infection among homeless adults and runaway youth, United States, 1989–1992;Allen;AIDS,1994
3. HIV risk behavior, street outreach, and condom use in eight high-risk populations;Anderson;AIDS Education and Prevention,1996
4. Substance use and risky sexual behavior among homeless and runaway youth;Bailey;Journal of Adolescent Health,1998
5. Battjes, R., Pickens, R. (1988). Needle Sharing Among Intravenous Drug Abusers: National and International Perspectives. National Institute on Drug Abuse Research Monograph 80. Rockville, MD: National Institutes of Health.