KUMAR, A.; SUMAN, S.; KUNDAN, K.; KUMAR, P. Evaluation of POSSUM scoring system in patients with perforation peritonitis. International Surgery Journal, [S. l.], v. 3, n. 4, p. 2181–2186, 2016. DOI: 10.18203/2349-2902.isj20163597. Disponível em: https://www.ijsurgery.com/index.php/isj/article/view/175. Acesso em: 27 jan. 2026.