Frias, Márcia C.A.A., et al. “Frequency of Chlamydia Trachomatis Ureaplasma Urealyticum and Mycoplasma Hominis in Endocervix of Women During Menacme”. Brazilian Journal of Sexually Transmitted Diseases, vol. 13, no. 3, Sept. 2001, pp. 5-22, https://bjstd.org/revista/article/view/382.