Cruz Junior, Ruy Jorge, Jorge Nahas, and Luiz Francisco Poli de Figueiredo. 2006. “Spontaneous Cholecystocutaneous Fistula: a Rare Complication of Gallbladder Disease”. São Paulo Medical Journal 124 (4):234-36. https://periodicosapm.emnuvens.com.br/spmj/article/view/2237.