Piacenza, G., Mesa, G. and Sáez, H. (1975) “Acute biliary conditions in geriatrics: analysis of 151 observations, therapeutic fundaments and results”, Cirugía del Uruguay, 45(4), pp. 311–314. Available at: https://replica-revista.scu.org.uy/index.php/cir_urug/article/view/2610 (Accessed: 14 June 2026).