C. A. de Oliveira, F. B. Russomano, S. C. dos S. Gomes Júnior, and F. de M. Corrêa, “Risk of persistent high-grade squamous intraepithelial lesion after electrosurgical excisional treatment with positive margins: a meta-analysis”, Sao Paulo Med J, vol. 130, no. 2, pp. 119–125, Mar. 2012.