PÉREZ FONTANA, Víctor. Early radiological sign of gastro duodenal perforations. Cirugía del Uruguay, [S. l.], v. 3, n. 2, p. 26–33, 2019. Disponível em: https://replica-revista.scu.org.uy/index.php/cir_urug/article/view/162. Acesso em: 14 jun. 2026.