Velitchkov, N., J. Losanoff, K. Kjossev, G. Grigorov, M. Vezdarova, and G. Kirov. “Stercoral Perforation of the Normal Colon: Report of Five Cases”. São Paulo Medical Journal, vol. 114, no. 6, Nov. 1996, pp. 1317-23, https://periodicosapm.emnuvens.com.br/spmj/article/view/2056.