Feitoza, Aline R., et al. “The Magnitude of the Infection for the HIV-Aids in Greaters of 50 Years in the City of Fortaleza-CE”. Brazilian Journal of Sexually Transmitted Diseases, vol. 16, no. 4, Apr. 2004, pp. 32-37, https://bdst.emnuvens.com.br/revista/article/view/536.