Delgado Pereira, Bolívar. 2020. “About Purpose of a Case of Sigmoid-Rectal Invagination from the Anus, Caused by Rectosigmoid Carcinoma”. Cirugía Del Uruguay 31 (1-2):82-89. https://replica-revista.scu.org.uy/index.php/cir_urug/article/view/1532.