Canessa, César, and María José Gómez del Valle. “Results of Surgical Treatment of Rectal Cancer at the Hospital De Clínicas. Decade 1989-1998”. Cirugía Del Uruguay, vol. 73, no. 1, Apr. 2003, pp. 59-67, https://replica-revista.scu.org.uy/index.php/cir_urug/article/view/4475.