Pires, Osmarina N, et al. “Epidemiological Surveillance on Syphilis in the Pregnancy at Centro De Saúde Do Uruará-Área Verde District”. Brazilian Journal of Sexually Transmitted Diseases, vol. 19, no. 3-4, Dec. 2007, pp. 162-5, https://bdst.emnuvens.com.br/revista/article/view/907.