Zagia, Miguel, and Daniel Cassinelli. “Chronic Ulcerative Colitis. Suppurative Pericarditis. Abdominal Pericardiectomy”. Cirugía Del Uruguay, vol. 42, no. 4, Feb. 1972, pp. 293-4, https://replica-revista.scu.org.uy/index.php/cir_urug/article/view/2260.