Lieb, S., Friedman, S. R., Chitwood, D. D., Liberti, T. M., Gates, G. J., Metsch, L. R., . . . Kuper, T. (2004). An HIV prevalence-based model for estimating urban risk populations of injection drug users and men who have sex with men. Springer-Verlag.

Lieb, Spencer, Samuel R. Friedman, Dale D. Chitwood, Thomas M. Liberti, Gary J. Gates, Lisa R. Metsch, Lorene M. Maddox, e Tamara Kuper. An HIV Prevalence-based Model for Estimating Urban Risk Populations of Injection Drug Users and Men Who Have Sex With Men. Springer-Verlag, 2004.

Lieb, Spencer, et al. An HIV Prevalence-based Model for Estimating Urban Risk Populations of Injection Drug Users and Men Who Have Sex With Men. Springer-Verlag, 2004.