Reducing substance use and risky sexual behaviour among drug users in Durban, South Africa: Assessing the impact of community-level risk-reduction interventions P. Petersen Williams, Tara Carney, Charles D.H. Parry • 2017
Rapid assessment of drug use and sexual HIV risk patterns among vulnerable drugusing populations in Cape Town, Durban and Pretoria, South Africa Richard Needle, Sarah Dewing, Tara Carney, Charles Parry, Paulo Petersen • 2008