9Auvert B. Ecological and individual level analysis of risk factors for HIV infection in four urban populations in sub-Saharan Africa with different levels of HIV infection. AIDS, 2001. 15(Suppl) : S15-S30
10Bloom SS. Looking for change in response to the AIDS epidemic: trends in AIDS knowledge and sexual behaviour in Zambia,1990 through 1998. J Acquir Immune Defic Syndr, 2000, 25(1): 77-85