Guevara Valmaña, O. I., H. E. Beyuma Mora, C. G. Chavez, L. M. Murguia Zamora, E. Gil Loaeza, and L. F. Palacio Pizano. “Gallstone Ileus, the Forgotten One: A Rare Cause of Intestinal Perforation and a Case Report”. International Journal of Research in Medical Sciences, vol. 8, no. 6, May 2020, pp. 2313-5, doi:10.18203/2320-6012.ijrms20202094.