S. Scapellato, V. Parrinello, G. Sciuto, G. Castorina, A. Buffone, and E. Cirino, “VALUTATION ON PROGNOSTIC FACTORS ABOUT SECONDARY ACUTE PERITONITIS: REVIEW OF 255 CASES”, Ann Ital Chir, vol. 75, no. 2, pp. 241–246, Mar. 2004.