Gonçalves, Maria Alice Guimarães, et al. “Cytological Changes Associated to Trichomonas Vaginalis: The Influence of a Second Agen”. Brazilian Journal of Sexually Transmitted Diseases, vol. 11, no. 1, Dec. 1999, pp. 4-10, https://bdst.emnuvens.com.br/revista/article/view/319.