Er, S., Y. Sevim, S. Özden, D. Tikici, B. D. Yıldız, B. C. Yüksel, U. F. Turan, and M. Tez. “A Novel Simplified Scoring System for Predicting Mortality in Emergency Colorectal Surgery: Prediction Model Development”. São Paulo Medical Journal, vol. 137, no. 2, Apr. 2019, pp. 132-6, https://periodicosapm.emnuvens.com.br/spmj/article/view/838.