Cendán Alfonzo, Juan E. “Conduct in the Treatment of Gastroduodenal Perforated Ulcers: Based on the Analysis of 197 Cases”. Cirugía Del Uruguay, vol. 26, no. 3, Mar. 2020, pp. 315-57, https://replica-revista.scu.org.uy/index.php/cir_urug/article/view/1299.