Ferreira, Andreia S., et al. “Rectosigmoidectomy in a Patient With a Prolapsed Sigmoid Tumor: Case Report”. Medicina (Ribeirao Preto), vol. 49, no. 6, Dec. 2016, pp. 570-3, https://doi.org/10.11606/issn.2176-7262.v49i6p570-573.