Rossi, B. M., W. T. Nakagawa, J. A. P. Fernandes, A. Lopes, and L. D. Paegle. “Treatment of Severe Actinic Rectitis”. São Paulo Medical Journal, vol. 116, no. 1, Jan. 1998, pp. 1629-33, https://periodicosapm.emnuvens.com.br/spmj/article/view/2193.