CASSINELLI, Daniel; GALARRAGA, José. Pneumoperitoneum due to sigmoid tension perforation. Cirugía del Uruguay, [S. l.], v. 45, n. 1, p. 50–51, 1975. Disponível em: https://replica-revista.scu.org.uy/index.php/cir_urug/article/view/2528. Acesso em: 25 may. 2026.