Ferraina, Pedro A., et al. “Experience in Laparoscopic Cholecystectomy at the Hospital De Clínicas José De San Martín: Buenos Aires’ University”. Cirugía Del Uruguay, vol. 63, no. 4-5-6, Apr. 1993, pp. 126-9, https://replica-revista.scu.org.uy/index.php/cir_urug/article/view/4179.