Reddy, M. V., T. A. Reddy, S. ., B. R. Teja, and P. ShanmugaRaju. “Application of APACHE II Score in Assessing the Severity and Outcome in Peritonitis Due to Hollow Viscus Perforation”. International Surgery Journal, vol. 6, no. 3, Feb. 2019, pp. 940-3, doi:10.18203/2349-2902.isj20190828.