Gadelha, Luciano M., and Creso M. Lopes. “The Influence of the Sexual Habit and the Risk of Infection for HIV: Knowledge of Univeristy Recently-Entrances in UFAC, Year 1999”. Brazilian Journal of Sexually Transmitted Diseases, vol. 12, no. 2, Sept. 2000, pp. 19-30, https://bdst.emnuvens.com.br/revista/article/view/246.