Das, K.; Ozdogan, M.; Karateke, F.; Uzun, A. S.; Sozen, S.; Ozdas, S. Comparison of APACHE II, P-POSSUM and SAPS II Scoring Systems in Patients Underwent Planned Laparotomies Due to Secondary Peritonitis. Ann Ital Chir 2014, 85, 16-21.